I am selling individual parts because I repurchased the main unit after it broke. These are common parts for the "Swing Maxi Electric Breast Pump (2021 model)", "Solo Electric Breast Pump", "Swing Maxi Flex Electric Breast Pump", and "Swing Flex Electric Breast Pump". *Not compatible with the "Old Swing Maxi Electric Breast Pump" or the "Old Swing Electric Breast Pump". [Compatible Breast Pumps] Swing Maxi Electric Breast Pump Swing Maxi Flex Electric Breast Pump Solo Electric Breast Pump Swing Flex Electric Breast Pump