Compatibility: These genuine duckbill valves are compatible with NCVI 8111/8131 wearable breast pumps. Meet your breast pump replacement parts needs. NCVI original pump parts Safety Material: Made of food-grade silicone, very safe. BPA free, no leakage, soft and odorless. Give mothers the best breastfeeding experience Replacement Guidance: It is recommended to replace the duckbill valve every 4-12 weeks to ensure the breast pump maintains optimal performance Easy to Clean: These replacement duckbill valves can be sanitized with water steam, boiling water after each use Tested by independent labs for quality and safety
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