This 2-pack of O-Rings is designed for use with the Medela Hands Free Collection Cups. Medela O-rings are great as a spare part or a replacement for worn or damaged O-rings.

Features:

• Includes 2 O-rings
• Breast shields and membranes sold separately
• Compatible with Medela's standalone Hands-free Collection Cups
• Authentic spare part made by Medela and designed to work with your Medela Hands-free Collection Cups
• Not compatible with Collection Cups that were included with the Freestyle Hands-free Breast Pump
• Medela recommends replacing your O-ring every 3-6 months, depending on your pumping frequency