... 28 x 18cmGross Weight: 4 kgs MaterialPump head: PVC, PVDF Diaphragm: PTFE Valve: PVC, PVDFValve ball: Ceramic Valve seat: Viton Tubing ... normal frequency(at running or stop).Glandless and leakage free diaphragm pumps.Low power consumption.Drive by electromagnetism,simple design,the ... speed of stroke is adjustable.Easy to install, the pump is together with foot valve, injection valve and tubes for ...