Plastic Locking Collar for Mighty / Crafty+ Glass Adapters

The plastic collar is the part that holds glass accessories on the Mighty, Mighty+ and Crafty+: it grips the fitting that normally takes the cooling unit and keeps the glass tube in place. What is sold here is the collar alone, without glass — a spare for when the original base has cracked or stayed behind on the device when a piece was pulled off. It should not be forced all the way round when fitted, as that damages the housing of the vaporizer.