Need some extra length and girth. Doc Johnsons Cock Master is a penis extension for your love making needs. Its a durable and realistic sheathe that will give you the size and confidence to penetrate your partner. The hollow dong slips on an erect or semi-erect penis. The incredible vacuum once you are inside ensures that the Cock Master wont slip. Give your f*ck buddy the orgasmathon they fantasize with the Cock Master. It is made from non-phthalate body safe material, which includes Doc's anti-bacterial Sil-A-Gel formula.