submersible deep well pump Impeller:plastic,Motorcoil:copper,Aluminum,Bearing:home/C&U,Shaft with Rotor:45#,AIS304,220v/50hz. ... (n=2850r.p.m)Insulation class BProtection IP45Material:Motor casing:Aluminum.Impeller: plasticMotor coil:copper/ aluminumCertificate:CE,GS,EMS,CCC,ISO9001 ...