Black, silicone butt plug with 2 heavy balls inside create a unique sensation. The 2 balls will knock and shake once you inserted.↵Key Features:- Length: 10 cm- Diameter: 2.2 cm and 2.6 cm- Color: Black- Material: smooth silicone↵Note: Use only with water based lubricant! Contact with oils and creams (sunscreen, edible oil, lip balm, etc.) may cause irreversible damage to the control unit and the entire toy.↵How to clean: Carefully clean the toy before first use and after each use with warm water and a mild soap. The cleaner is especially suited for cleaning erotic toys