We now Offer Inserts for all of our bangers. These insets are for perfect extra heat retention or to presrve the life of your banger. Or if you prefer the insert tech way of vaporizing. Made with 18mm tubung for our 25mm cups and made with 24mm tubing for our 30mm cups. All are made in house in our studio by our skilled craftsman in the hear of Long Island Ny using the highest quality american quartz. Available in both flat and round bottom.