The cylinder support has been designed to help you in transporting your cylinder safely in cars. It has a carrying handle and flat base to stop cylinders rolling. Depending on the individuals diving equipment the cylinder support can be left on whilst diving. If however you do not wish the support to be attached permanently simply take off the rubber seal.This support fits 10 and 12 ltr cylinders, NOT DUMPYS. The support is new and you can choose a colour between black, blue, green or pink. Full instructions included.