ESSENTIAL FOR PUMPING: Replaceable duckbill valves for Zomee Z1 and Z2 breast pumps. INCLUDED: Two (2) duckbill valves. CONVENIENT: Zomee duckbill valves are easy to install, just insert them into the breast shield body. To remove pull the small nub on the valve. SAFE: Made with food-grade silicone, BPA free and manufactured in FDA compliant facilities according to regulations for materials that contact food. Keep a few spare Zomee Silicone Diaphragms with your breast pump so you will never be without a working pump whether at home, on the road, or in the office! Replacement Duckbill Valve for Zomee Breast Pumps. Duckbill valves contribute to your breast pumps suction power. Due to wear and tear of everyday use, we recommend replacing these valves on a regular basis. Installing the duckbill valves is easy - simply place them into the breast shield body firmly. To remove, gently pinch the small nub on the valve and pull. Properly assembling your shield kit is essential to get the ideal performance while pumping. All Zomee breast pump parts should be sterilized or washed with warm water and soap. Our valves are BPA free, 100% food-grade silicone, and made in FDA compliant facilities.