This premium prostate exercising tool is ideal for anal massage and stimulation. Contoured to curve with the male anatomy perfectly so it massages the prostate and the perineum simultaneously. When inserted, the tool will move with you, stimulating with every thrust for maximum pleasure. Made of premium silicone, with an ABS plastic base, so it is non-porous and cleans easily. Measurements: 4.25 inches in total length, 3.5 insertable, 0.75 inches in diameter at widest point. Material: Silicone, ABS plastic. Color: Black