This premium prostate exercising tool is ideal for anal massage and stimulation. Contoured to curve with the male anatomy perfect so it massages the prostate and the perineum simultaneously, while 6 modes of rhythmic vibration will send him over the edge. Once inserted, the Cobra will move with every thrust for maximum pleasure. Made of premium silicone, so it is non-porous and easily cleaned. Measurements: 4.75 inches in total length, 3.5 insertable, 0.85 inches in diameter at widest point. Material: Silicone, ABS. Color: Black. Note: Requires 2-AA batteries, not included