The Aspire BCC coils for the Aspire K1 for pretty much the same as the GS-Air coils, except smaller diameter and the have a silicon seal inside the vapor hole in the top instead of the flat seal the GS-Air coils have! They are a great little tank for tootle puffers, one nice thing is they are an Ego thread so you use an adapter and never have to chance messing up the threads in your mod, just unscrew the tank and leave the adapter in place! At less than $8 one heck of a bargain, the flavor is really good, only thing is it is small diameter, tall and only holds 1 1/2 ml of ejuice.One to two layers of non-woven gauze, depending on your juice. It was a bit of a pain holding the gauze
while replacing the cap. @pufZeppelin mentioned mesh being used in another coil similar to the GS Air
coils.
I like the mesh, stays in and reuse over and over! Success tastes mighty sweet don't it?