Cock features realistic head and a veined straight shaft with balls. Material is non-toxic, body safe, and phthalate free. Just put the suction cup down on any flat surface or use with a partner in a strap on harness. Only use the stretchy style of o-rings. Metal ones may damage the skin. Always clean before and after use. A water based lubricant is recommended. Insertable length 7 inches, diameter 1.9 inches.