The Twisted Messes and Augvape Occula RDA sports an overall diameter of 24mm, matching most vape mods on the market today, including box mods and mechanical tube mods. One of the primary features of this atomizer is its unique and innovative clamp style build deck. This deck is designed to easily fit all of your exotic and thicker coils such as Fused Claptons, Aliens, and more. Not to mention, this style of deck is easier to build on in general. Also, the Occula supports both single and dual coil builds.