Hegen Manual Breast Pump Diaphragm (SoftSqround) is a replacement diaphragm for Hegen Manual Breast Pump. Depending on the frequency and intensity of use, we recommend replacing the Diaphragm and Stem every 2-3 months or as soon as wear and tear is observed. This is to ensure that the expression of milk will not be affected by worn out/used parts during the pump cycles. Contains 1x Manual Breast Pump Diaphragm (SoftSqround) Compatible with Hegen Manual Breast Pump (SoftSqround) only