Ass Ballz a backdoor favorite. The heavy Baller is 100% Medical Grade, high end silicone with no filler. The seamless, matte surface has a soft touch silicone finish. Each of the 4 insertion balls is 1.6 (4cm) with three 1.6 (4cm) length of durable silicone between each. The Baller is extremely pliable and has a ringed handle for a secure grip and easy manipulation. Dimensions:Length 16 in.Ball Width 1.6 in.