THE SILICONE GASKET: Premium silicone, with less stretch of the Super Elastique 3000 but more stretch than The Collar, you can wear longer for maximum support and comfort. Dura Technology made-to-fit materials not only stand the test of time but also stand the wear and tear. Rock Solid cock rings combine quality and comfort for your best performance. sizes .75", 1", 1.25". The Silicone Gasket cock ring: wear longer for maximum support and comfort. compatible with silicone personal lubricants. easy to clean with soap and water.