2pcs Duckbill Valve Breast Pump Backflow Protection Silicone Nipples - Fits. Introducing Our Premium Silicone Breast Pump Accessories, Designed to Enhance the Comfort and Efficiency of Your Breastfeeding Experience. Crafted from High-quality Silica Gel, These Components Ensure a Safe and Seamless Milk Collection Process. Available in a Transparent Design, They Provide a Perfect Fit for Various Breast Pumps with Three Size Options to Choose From: - Size A: Inner Diameter 20mm, Outer Diameter 25mm - Size B: Inner Diameter 16mm, Outer Diameter 22mm - Size C: Outer Diameter 22mm Each Package Includes Two Pieces, Offering Great Value and Convenience. These BPA-free Accessories Are Specially Designed to Prevent Backflow and Are Compatible with Steam, Boiling Water, or Microwave-steam Bags for Easy and Thorough Sanitation. Key Features: - Age Range: Maternity, 0-6 Months, 7-12 Months - Material: High-quality Silicone - Cleaning Method: Steam Disinfection - Color: Transparent - BPA Free and Safe for Both Mother and Baby - Comes with Backflow Prevention Duckbill Valves - Easy to Clean with Warm Soapy Water - Package Includes: 2 Pieces Please Note: Slight Color Variations May Occur Due to Different Monitor Settings, and a 1-2mm Measurement Deviation is Possible Due to Manual Measuring..