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Airgas - HRPMG-470C40 - Harper™ Series MG Medical Single Cylinder Hand Truck With 8" X 1 3/4" Semi-Pneumatic Wheels, 3" X 1 1/4" Rubber Rear Caster And 6" X 14" Base Plate (For Large Cylinders)
Magliner Hand Truck,1000 lb.,61"x20-1/2"x19" GMK81UA4 - Walmart.com
Gas Cylinder Hand Truck, 2 Tanks, Rear Casters, HT953FS - USAsafety.com
Convertible Hand Truck & Dolly Cart Heavy Duty Aluminum Hand Truck 2 in 1 Folding Multi-Cart Pneumatic Wheels, 400 lbs Load Capacity, Multi-Position Dolly Platform Cart - Amazon.com
Vestil Heavy-Duty All Terrain 1,400 lb. Capacity Multi-Purpose Dolly, 8 Wheels - John M. Ellsworth Co. Inc.