This set includes 2 breast shields that work with Medela's hands-free breast shields. Made from BPA-free materials, these comfortable breast shields are designed to be compatible with Medela breast pumps with hands-free breast shields. sold separately Features: -27mm - Genuine breast pump spare parts manufactured by Medela - Compatible only with SKU 1083087 Hands-Free Collector. - Has markings indicating the amount of breast milk expressed - Made from BPA-free silicone - Polypropylene breast shield - Collectors, breast pumps and O-rings sold separately