{"product_id":"cthulhu-spire-mtl-boro-rba","title":"Cthulhu Spire MTL Boro RBA","description":"\u003ch2 class=\"text-xl font-bold text-text-100 mt-1 -mb-0.5\"\u003eCthulhu Spire MTL RBA\u003c\/h2\u003e\n\u003cp class=\"whitespace-normal break-words\"\u003eThe Spire MTL RBA by Cthulhu has been designed with MTL vaping at the forefront. There aren't many dedicated MTL rebuildables on the market - most are just all-rounders - but Cthulhu used computational fluid dynamics software for airflow optimisation, bringing you quiet and smooth bottom airflow. They've included four different airflow pins ranging from 1.0-1.8mm with two chimney options to really customise your draw and throat hit. The Cthulhu Spire MTL RBA is designed in a BORO configuration with the inclusion of the Cthulhu Boro Tank, so you can pair this with most BORO mods and AIO setups. With 3.5mm large head screws, the single coil deck allows for easy coil installs with that flavour-focused airflow system just beneath. Cthulhu are well known for their high-end rebuildable quality and flavour-focused RBAs, and the Spire MTL RBA is no exception.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0302\/7002\/9869\/files\/cthulhu-spire-mtl-boro-rba-1.webp?v=1761814857\" alt=\"Cthulhu Spire MTL RBA with boro tank dome chimney and airflow pins showing 316SS construction and single coil deck\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003ch2 class=\"text-lg font-bold text-text-100 mt-1 -mb-1.5\"\u003eSpire MTL RBA Key Features\u003c\/h2\u003e\n\u003cul class=\"[\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc space-y-2.5 pl-7\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eBoro Configuration\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eRebuildable Atomiser\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eIncludes Cthulhu Boro Tank\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eMTL Vaping\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eQuiet \u0026amp; Smooth\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eBottom Airflow\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e4 Pins: 1.0 \/ 1.2 \/ 1.4 \/ 1.8mm\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e3.5mm Large Head Screw\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eEasy Single Coil Installation\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eFlat \u0026amp; Dome Shaped Chimneys\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eDesigned to offer Different Throat Hits\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eMade From 316SS\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"text-lg font-bold text-text-100 mt-1 -mb-1.5\"\u003eBoro Configuration with Included Tank\u003c\/h3\u003e\n\u003cp class=\"whitespace-normal break-words\"\u003eThe Spire MTL RBA uses boro configuration, which means it fits most boro mods and AIO devices on the market. Cthulhu includes their own boro tank in the box so you can start vaping straight away. If you've already got a boro mod, just drop the Spire in and you're sorted. The standardised boro sizing makes this RBA compatible across different setups without needing adapters or modifications.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0302\/7002\/9869\/files\/cthulhu-spire-mtl-boro-rba-5.webp?v=1761814856\" alt=\"Cthulhu Spire MTL RBA base showing bottom airflow design with computational fluid dynamics optimized airflow channels for quiet smooth vaping\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003ch3 class=\"text-lg font-bold text-text-100 mt-1 -mb-1.5\"\u003eMTL-Focused Bottom Airflow Design\u003c\/h3\u003e\n\u003cp class=\"whitespace-normal break-words\"\u003eCthulhu used computational fluid dynamics software to design the Spire's airflow system. What that means in practice is quiet, smooth airflow without the whistling you get from some bottom airflow RTAs. The airflow comes up from beneath the coil, hitting your build directly for focused flavour. Because it's designed specifically for MTL rather than being adapted from an RDL system, the draw feels natural and controlled.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0302\/7002\/9869\/files\/cthuhlu-spire-mtl-boro-rba-2.webp?v=1761814857\" alt=\"Spire MTL RBA complete kit showing single coil deck flat and dome chimneys four airflow pins and boro tank components\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003ch3 class=\"text-lg font-bold text-text-100 mt-1 -mb-1.5\"\u003eFour Airflow Pins and Two Chimney Options\u003c\/h3\u003e\n\u003cp class=\"whitespace-normal break-words\"\u003eYou get four airflow pins in the box: 1.0mm, 1.2mm, 1.4mm, and 1.8mm. Swap them out to adjust how tight or loose your draw is. Smaller pins give you a cigarette-tight MTL inhale. Larger pins open things up slightly for a looser restricted draw. The Spire also includes two chimney options - flat and dome-shaped. The flat chimney gives a sharper throat hit. The dome shape smooths things out. Between the pins and chimneys, you can dial in exactly how you want your vape to feel.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0302\/7002\/9869\/files\/cthulhu-spire-mtl-boro-rba-3.webp?v=1761814856\" alt=\"Spire MTL RBA chimney options showing flat chimney for sharp throat hit and dome chimney for smooth MTL vaping\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003ch3 class=\"text-lg font-bold text-text-100 mt-1 -mb-1.5\"\u003eSingle Coil Deck with 3.5mm Screws\u003c\/h3\u003e\n\u003cp class=\"whitespace-normal break-words\"\u003eThe deck uses a single coil configuration with large 3.5mm head screws. Installing coils is straightforward - the big screws are easy to grip and tighten without fiddling. Wicking is simple too, with clear channels showing you where the cotton needs to sit. Single coil setups use less power and less e-liquid than dual coil builds, which suits MTL vaping where you're after flavour rather than clouds.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0302\/7002\/9869\/files\/cthulhu-spire-mtl-boro-rba-4.webp?v=1761814856\" alt=\"Spire MTL RBA single coil deck with 3.5mm large head screws showing easy coil installation and wicking ports\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003ch3 class=\"text-lg font-bold text-text-100 mt-1 -mb-1.5\"\u003eHigh-End Build Quality from Cthulhu\u003c\/h3\u003e\n\u003cp class=\"whitespace-normal break-words\"\u003eThe Spire MTL RBA is made from 316 stainless steel. Cthulhu have a reputation for solid machining and quality control on their rebuildables. The threading is smooth, the parts fit together cleanly, and everything feels well-made rather than loose or cheap. If you've used Cthulhu RTAs before, you know what to expect - this RBA keeps up that standard.\u003c\/p\u003e\n\u003ch3 class=\"text-lg font-bold text-text-100 mt-1 -mb-1.5\"\u003eWhy Choose the Spire MTL RBA?\u003c\/h3\u003e\n\u003cp class=\"whitespace-normal break-words\"\u003eThe Spire MTL RBA is built specifically for MTL vaping rather than trying to do everything. You get proper MTL airflow that's been engineered with software rather than guessed at. Four airflow pins and two chimneys let you fine-tune your draw and throat hit. The boro configuration means it fits most AIO setups, and Cthulhu includes their own tank so you're not hunting for compatible parts. Single coil building is straightforward with those large 3.5mm screws. If you want a dedicated MTL rebuildable with proper engineering behind it, the Spire delivers.\u003c\/p\u003e\n\u003ch3 class=\"text-lg font-bold text-text-100 mt-1 -mb-1.5\"\u003eWhat's in the Box?\u003c\/h3\u003e\n\u003cul class=\"[\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc space-y-2.5 pl-7\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e1 x Cthulhu Spire MTL RBA\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e1 x Cthulhu Boro Tank\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e4 x Airflow Pins (1.0mm, 1.2mm, 1.4mm, 1.8mm)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e1 x Flat Chimney\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e1 x Dome Chimney\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e1 x Spare Parts\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e1 x User Manual\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CTHULHU","offers":[{"title":"Default Title","offer_id":48801450328307,"sku":"E38195HC02S","price":20.83,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0728\/5954\/9939\/files\/Cthulhu-Spire-MTL-Boro-RBA.png?v=1775418694","url":"https:\/\/ajsuperstore.co.uk\/products\/cthulhu-spire-mtl-boro-rba","provider":"AJ’s Superstore","version":"1.0","type":"link"}