The "Top Hat" Enail adapter head is the replacement head for the OG Enail. This Enail adapter head fits coils with an internal diameter of 16mm (0.625") and a maximum coil height of 16mm. The Hinged Carb Cap "Top Hat" Edition was created by Highly Educated for Doug of Hitman Glass. A flippable hinge is used to attach the carb cap to the titanium moat. Never loose you carb cap again and always have it where you need it most. Conveniently carb your dab by flipping the hinged cap over the moat. When the moat is capped, the two opposing holes on the cap's sides evenly restrict air intake while slowly vaporizing your concentrates at a lower temperature. This creates milky white hits making the most of your concentrate’s flavor and effectiveness. The cap also provides insulation as well as protection from wind for outdoor applications. Each Adapter Head comes engraved with a Hitman logo.