This innovative penis pump helps increase pressure and blood flow to encourage length and girth for fuller erections and increased size. It features a built-in PSI gauge and a magnified cylinder with measurements up to 7 ½". The base can be used with or without the tapered silicone donut. Designed with an easy-to-use pistol grip, a flexible air hose, and a pressure-release trigger valve, it also includes an ultra-soft silicone cock and ball ring. ABS Plastic, Silicone, Iron, Copper. Cylinder: 8 1/4" x 2 3/4". This item is non-returnable. You must be 21 years or older to order Sexual Aids.