Philips Avent Electric Breast Pump Replacement Parts Kit.Our breast pump expression kits are made with a perfect balance of suction and nipple stimulation. It comes with silicone cushions that gently adapt to your nipple size and shape for a more efficient and comfortable pumping experience.Kit Contains:- Two (2) Philips Avent 4 oz Bottles- Two (2) Screw Rings- Two (2) Sealing Discs- Two (2) Flanges- Two (2) White Valves- Two (2) Silicone Tubes and Caps- Two (2) Pump Bodies- Two (2) Silicone Diaphragms.