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5" x 2-1/4 U-Groove Steel Wheel with Offset Hub (Fits 1-5/8" Pipe) - 600 lbs Capacity, Mapp Caster PWMO50158: Amazon.com: Industrial & Scientific
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Amazon.com: 2 U-Groove Caster Wheel,Heavy Duty Nylon Wheels,Directional Sheave,Track Wheel for Round Tube,Double Bearing,for Industrial Machines,Sliding Door,Rolling Gates,Wire Rope Rails (32mm/1.25in) : Industrial & Scientific
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