Colt Nipple Pro Suckers Red. Includes 2 fully adjustable multi-use suckers. Unique vacuum pressure design; simply twist to adjust suction. Incredible suction for increased sensitivity. Secure seal stays in place. Disassembles for easy cleaning. Made using body safe materials: Acrylonitrile Stryrene AS cylinder, ABS plastic cap, plunger, Silicone seal. 4 inches by 1.5 inches.