Type: Diaphragm/ Duckbill Valve/ 22mm Little Breast Cover/ 26mm Little Breast Cover/ 24mm Breast Cover/ 28mm Breast Cover 8oz Cup/ Connector (Optional). Feature: 1. Optional pair of accessory: diaphragm, duckbill valve, 22/ 26mm little breast Cover, 24/ 28mm breast Cover, 8oz cup, connector.