If you fall a bit smaller than the average recommended size for the Onyx series then the Tight Fit Sleeves are for you. These Sleeves are exclusively designed for Kiiroo Onyx (1, 2 and +) male masturbators Pleasure Core. The sleeve texture features a stimulating internal texture and promises an unforgettable squeeze as you thrust forward into the Tight Fit orifice. Just place your Tight Fit sleeve inside your Kiiroo Onyx (1, 2 and +) and secure the Grip Clip back in place