1 year warranty 2.100% copper wire by automatic wiring machine 3.Anti-rust treatment castings and electrophoresis for some parts 4.Completely processed shaft by CNC precision automatic lathe + electroplating 5.Brass impeller, cast iron impeller, plastic impeller is available 6.Double mechanical seals, stainless steel screws and bolts,will prolong the lifetime. 7.Thermal protector is imported from TAIWAN
