The CB-3000 is made of medical grade polycarbonate material. It is lightweight hypoallergenic and durable. 3 in. length 1.45 in. inside diameter cage. The cage portion is vented for hygiene and has a bottom opening allowing use at urinals. The different size rings and spacers included in each package allow you to customize your fit to your individual needs. The CB-3000 restricts you from touching your genitals for sexual pleasure and gives the Keyholder control over the sexual fulfillment of both partners. Numbered plastic locks included allow wearer to go through metal detectors without setting off alarms.Package includes: 1 cage portion 5 different size rings Locking pins and spacers One brass padlock Five individually numbered plastic locks; and black zippered carrying case.