The exclusive, patented Ameda HygieniKit, creates one of the most effective milk collection systems available today. It helps mothers provide the purest milk possible to their babies. The kit's unique silicone diaphragm acts as a barrier, separating the user from the suction source. This helps ensure milk purity by preventing contaminants from coming in contact with collected breast milk and prevents milk back-up so tubing and pump require little to Yes maintenance. The HygieniKit offers mothers the choice of single or dual pumping. It also easily converts to manual pumping with the One-Hand Breast Pump (Yest included). Additional Information Included:(1) Tubing adapter (2) Silicone tubings (2) Adapter caps (2) Silicone diaphragms (2) 25mm breast flanges (4) Valves (2) 4 oz. bottles with caps FBPA and DEHP Free!