InBra Membranes are extra membranes for your Medela Magic InBra™ breast pump. As part of your regular pumping routine, be sure to examine your pump parts. If you notice damage or extensive wear, replace the part immediately. Medela recommends replacing your membranes every 3–6 months, depending on your pumping frequency. IMPORTANT: Use of pump parts or accessories not designed for your specific breast pump may cause irreversible damage to the product. For that reason, only use the accessories that came with, or are identified by Medela to work with, your specific breast pump model. Each pack contains two (2) silicone membranes. Features: - AUTHENTIC MEDELA REPLACEMENT PARTS: This 2-pack of Magic InBra Membranes are an authentic spare part made by Medela and designed to work with the InBra breast pumps - COMPATIBILITY: Works only with the Medela InBra™ breast pump - REPLACE REGULARLY: Medela recommends replacing your membranes every 3–6 months, depending on your pumping frequency - MADE WITHOUT BPA: InBra Membranes are made of 100% food grade silicone - WHAT'S INCLUDED: Each pack includes two (2) Magic InBra™ silicone membranes