Breastshield Set for Bellema Melon Breast Pumps is compatible with Bellema Melon breast pumps. Cannot be used with Mango/Professional models. Contains 2 Breastshields(27mm), 2 Silicone Cushions, 2 Valves, 2 Membranes. With Silicone Cushion the Breastshield can fit 24mm nipple diameter. Made from BPA Free materials, FDA Approved.