SM bus bar insulator Material: porcelian Type:1.SM-25Tensile strength(LBS): 500,Torgue Strength(FT LBS):6, Voltage withstand(KV):6,screw(mm):6, weight(G):282. SM-30Tensile strength(LBS): 550,Torgue Strength(FT LBS):8, Voltage withstand(KV):8,screw(mm):8, weight(G):443. SM-35Tensile strength(LBS): 600,Torgue Strength(FT LBS):10, Voltage withstand(KV):10,screw(mm):8,weight(G):504. SM-40Tensile ...