This pump collection kit includes our exclusive, patented system with a unique silicone diaphragm that prevents moisture and milk from entering the tubing - so there's no need to clean the pump tubing! Sterile, pre-assembled and ready to use Fits all Ameda breast pumps Easy to clean and re-assemble Pump into any standard-thread baby bottle or milk storage bag Includes our One-Hand Breast Pump Single Pumping Kit