Affordable, easy-to-use erection-enhancement pump creates a vacuum around the penis, encouraging an erection by increasing blood flow. Can also help make an erection harder & bigger. Flanged cylinder with universal measures has a tapered silicone donut for maximum suction. Includes two interchangeable sleeves (plain and ribbed) that provide added stimulation. Non-crimping air hose has quick-release valve. 8 3/4"L x 2 1/2"Dia. This item is non-returnable. You must be 21 years or older to order Sexual Aids.