1. CE certificate 2. stainless steel clamp 3. 440C alloy stainless steel grinder 4. 2 years' warranty Model FLOWHEADOUTPUTSPEED VOLT/FREQOutlet DIA.M3/HMKWRPMV/HzmmWQASD7-12-0.97120.92900220V/50Hz ,Single Phase 40WQASD7-16-1.27161.22900220V/50Hz ,Single Phase 40WQAS7-12-0.97120.92900380V/50Hz ,Three Phase 40WQAS7-16-1.27161.22900380V/50Hz ,Three Phase 40WQAS7-21-1.57211.52900380V/50Hz ,Three ...