Set of 2 transparent cylinders. The Temptasia Nipple Pumping cylinders are compatible and interchangeable with other Temptasia pumps and accessories. When used with a quality pump, they provide temporary engorgement and increased sensitivity to the nipples. The cylinders have crystal clarity for easy monitoring and are detachable to maintain suction during play. These cylinders, with an internal diameter of 1'', are larger than average. Made from body-safe acrylic materials, the Temptasia cylinders are easy to use and clean. The package includes 2 cylinders. The tubing and pump are not included.