Need some extra length and girth? Doc Johnson's 10.5 inch 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 ofB B phthalate-free body-safe PVC material.B Available in White. Proudly Made in America.