The Master D is a thick, lifelike penis with testicles. It is handcrafted to satisfy you in both material options. The Dual Density ULTRASKYN warms up upon touch and is designed with a soft exterior and a firm core to simulate the feel of a real penis, while the FIRMSKYN option provides a firmer sensation in a classic product material. The firmer material offers greater intensity, made from classic Doc Johnson PVC material. It features a suction cup base for added stability and is compatible with O-ring harnesses. Phthalate-free and body-safe.