Add a little rhythm and shake to your sex life with this sensation inducing PARTY UP Heavy Balls Silicone Butt Plug. This weight will cause the balls to knock and shake, creating a unique sensation that once inserted will cause the wearers muscles to contract and respond to the sensations. - Length: 10.4 cm - Max Width: 2.6 cm - Min Width: 2.2 cm - Weight: 71 grams - Material: Silicone