Need some extra length and girth? Doc Johnson's Cock Master is a durable and realistic penis extension that will give you the added size you've been craving. The hollow dong slips on an erect or semi-erect penis to create an incredible vacuum effect that ensures you won't slip out. The Cock Master is made of non-phthalate body-safe PVC material, which includes Doc's antibacterial Sil-A-Gel formula. Available in White. Proudly made in America. PVC 10.10 inch Cock Master Penis Extension Hollow inner length 5 inches Phallic Shaped Sil-A-Gel Formula 100% Phthalate Free