Black, silicone butt plug with 2 shaking heavy balls inside to create a unique sensation. The 2 balls will knock and shake once you inserted. Wearing of these balls is so very enjoyable and exciting sensation.↵Key Features:- Length: 1.25 cm- Insertable length: 10 cm- Diameter: 2.3 cm and 3.3 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