Master MH 60VBOA GFA Portable Gas Torpedo Heaters 60,000 BtuH Heating Capacity Output, 1,500 sq ft Heating Area 2925P3TI (1) Hex Bit 1 in (1) Hex Bit 1 in 3 32 in Series 1740 Wheel Type Rigid Load Capacity 267 lb Foam Material None Latch Double Throw Water and Air Tight O Ring Yes Number of Wheels 2 Closure Type Padlock Stackable Yes Pressure Valve Type Automatic Resistant To Crush 500 sq ft Features Time Tested Electronic Ignition for Easy Start Up Heater Voltage 120 V AC Standards CSA Item Portable Gas Torpedo Heaters For Use Indoors Outdoors Indoor Only Automatic Safety Shut Off Included Yes Frequency 60 Hz Ignition Power Source Battery Heating Capacity Output 60 Portable Gas Torpedo Heaters