features: vhs motor wpi enclosure with rodent screen protection 1.15 service factor class f insulation vertical p base premium efficiency inverter duty 10:1 variable torque spike resistant wiring per nema mg-1 part 31 120 volt space heaters double thrust bearing design (100-500 hp) for deep well applications winding rtds (125-500 hp) white epoxy paint for cooler surface temperature standard coupling size included mc320-1.25-.25 (alternate couplings available)