Sinclair is excited to offer the Tantus Stroker...truly a first of its kind. This masturbation sleeve that is healthy for the body because it is made out of 100% Ultra-Premium Platinum Silicone. The outside of the sleeve is not representational, while the inside has soft ridges that provide rhythmic stimulatioin that simulates vaginal contractions. The top ridge is narrow so that when the head of the penis is pulled through, teh corona is directly stimulated. The Tantus Male Masturbator is soft to the touch but is tough enough to be washed by hand, boiled, bleached in a 10% bleach solution, or even put in the top shelf of your dishwasher. It's not invincible though...only use water based lubricants with your silicone adult toy. Dimensions: 1.66"x 6.5".