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 COLT Nipple Pro-Suckers. Twist once for a light suck, twist some more for an erect set. Sensitize those nips while getting a full hands free view of them. The COLT 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. 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)