Medela Freestyle Hands-Free Breast Collection Cups Accessories with 21mm and 24mm Shields is compatible to use with Medela Freestyle Handsfree and Medela Swing Maxi 2.0. Medela Freestyle Hands-Free Breast Shields are one of the three parts of our Medela Freestyle Hands-Free Collection Cups. They are extra breast shields if you wish to change sizes or have a spare set. They come in 21mm and 24mm Shield sizes to fit, to help you find the most comfortable, and efficient position to pump, even as your breast shape/size changes. Its a whole new pumping experience, personalized to you. ANATOMICALLY DESIGNED CUPS: Research-based hands-free collection cups designed to avoid localised compression and maximise milk flow, with a broader lower half to support the underside of the breast and a smooth surface and rim which flares away from the breasts COMFORTABLY LIGHTWEIGHT: Ultralight, wearable collection cups, weighing 76g each, are designed to sit discreetly in your bra and mimic the shape of the lactating breast for discretion and comfort. ONLY 3 PARTS: To clean, dishwasher safe and easy to assemble. TRANSPARENT DESIGN: Easy to align nipple and see milk flow. BPA-Free What’s Included: 2 pcs x Medela Freestyle Hands-Free Breast Shield 21mm 2 pcs x Medela Freestyle Hands-Free Breast Shield 24mm 2 pcs x Medela Freestyle Hands-Free Membrane 2 pcs x Medela Freestyle Hands-Free Collection Cups 1 pce x Medela Freestyle Hands-Free Tubing