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 ion 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.