For those who never shy away from erotic play! The UR3 sleeve has 20 ribs to give you pleasure and satisfaction. The 7.5â   vibe has a diameter of 1à¼â   however; the diameter jumps to 1à¾â   with the sleeve on! The head of the sleeve has a charming blush of color too! The powerful multi-speed vibe requires 2 C size batteries, not included. UR3 stands for Ultra Realistic 3, the ultimate skin. You won't be disappointed either!