Fanny Hill's Silicone Butt Plug Black from Nasstoys of New York. 7 functions. Inflatable and vibrates. Expandable Butt Plug expands to 2.75 inches. Air release button. Body safe. Waterproof vibrating butt plug. Material: PVC, Silicone, ABS Plastic. Size Butt plug total length 5 inches, Insertion length 4 inches. Diameter 4 inches.Expands to 2.75 inches. Attached power control length 3.75 inches. Tube length 16 inches. Vibrating butt plug requires 2 AAA batteries, not included.