Ameda 2 Pack Breast Pump Kit Valves, Replacement Valves for Ameda Breast Pump Kits, Compatible with all Ameda HygieniKit Milk Collection Systems, Maintain Pump Performance, BPA Free DEHP FreeSilicone Imported ENSURE BEST PERFORMANCE: Our valves are compatible with all Ameda breast pumps and HygieniKit Milk Collection Systems. To ensure the best performance of your Ameda breast pump, we recommend replacing valves every 8 12 weeks, depending on cleaning and use. LIKE NEW SUCTION: If you find your breast pump is losing suction, it may be time to replace the valves. Our replacement valves can help your pump maintain its like new function and