The Orbit Premium Suction Pool Cleaner keeps your pool clean and clear. The diaphragm operates at the rate of approximately 360 beats per minute. The design has been perfected over many years, and if properly cared for, the diaphragm will last for several seasons. The cleaner assembly includes a 40' hose, Orbit cleaner disc, deflector wheel, (2) hose weights, flow control valve, control valve adaptor and hose adaptor.