Enjoy powerful suction with this pair of powerful suction cylinders. There's nothing hotter than a sexy pair of nipples standing at attention. Or maybe your nipples are feeling a bit inadequate, perhaps it's time to give them a good suck and add some kink with the Cal Exotics Nipple Play Vacuum Twist Nipple Suckers. These nipple pumps use a unique vacuum pressure design that you simply twist to adjust suction for increased sensitivity. Sensitize those nips while getting a full hands free view of them. The Cal Exotics Nipple Play line of toys are made of high quality materials that are phthalate free and waterproof. For a better seal use your favorite Water Based Lubricant. Color: Black, Clear Materials: AS (cylinder), ABS Plastic(cap, plunger), Silicone (seal) Length: 4 inch Insertable Length: 1.5 inch Width: 1.5 inch(overall), 1.3 inch(internal)