This Ballstretcher from Oxballs is made from Silicone. Lube it up and push your ballsack into the stretched tube and it molds to your sack. The thick rubber rim keeps the bend in your balls. Coolest thing about this one is the curve. Wear it so it tilts your sack down and forward, grease up your meat and whack off. Feel your balls slap against your hand with every pump. Or wrist it around and it aims your nuts back towards you hole. Lube safe. Large ball stretcher total length 3 inches - 1.5 inches on the lower side, total diameter 2.125 inches, inside diameter 1.25 inches, weight 3.5oz. Always clean before and after use.