FEATURES: • Open Dripproof Air-Over • F1 Assembly Position • Rodent Screens, Extra Long Leads, Class F Insulation • Thermostat Protected (Overheating Protection) • Requires Leads to be connected to Control Circuit of Motor Controller • Non-Standard 1-1/8 Diameter X 3-1/4 Long Keyed Shaft Is Drilled On Center 1 Deep & Tapped 1/4-20 UNC