Rooster Rumbler Vibrating Silicone Anal Plug. Medium size – perfect for Intro anal play. Smooth and Firm with flared base for Safety. 3 speeds . 4 patterns of vibration. USB rechargeable. Waterproof. Materials: Silicone and ABS Plastic. Dimensions: Overall Length – 4 inches. Insertable Length – 3.5″. Widest Insertable Diameter – 1.4″ Length – 3.5 inches. Widest Diameter – 1.4 inches.