Sai Coil Building Kit "VapeCase" and this one requires a

and this one requires a power source like one of these box mods

This bubbler cools better than the dry mouthpieces for the Accessory Attachment

No Batteries

making it a great choice if you need a spare battery to swap out between sessions

and has a distinctive logo on the back so you can tell it from your regular caps

Sai Coil Building Kit "VapeCase" and this one requires aThe Sai Coil Building Kit comes with everything you need to build six of your own coils, except for the wires. The kit comes with six (6) of each: coil housings, threaded caps, ceramic cups, quartz rods, pins, gaskets, and wire sleeves. Coil building is an advanced procedure for do it yourself enthusiasts. If you don't already know how to do it, please do not purchase this kit!