Diaphragm is made of synthetic rubber EPDM with premium quality. Diaphragm set consists of Diaphragm Ring + Diaphragm Base. It is main component part which works in double diaphragm form of “Hiblow” air pump. It induces electromagnetic core to create sucking and blowing at the same time to deliver continuous airflow. Therefore, air power will never drop. However, Diaphragm needs frequent change as it is broken as a result of continuous operation or very long working hours of air pump. Then, new diaphragm has to be changed before air pump operates again.