Trolley, Trolley Type Push, Maximum Load Capacity 1,200 lb, Trolley Frame Material Cast Aluminum, For Beam Shape Flat, Tapered, For Minimum Beam Flange Width 2 in, For Maximum Beam Flange Width 3 1/2 in, Headroom to Connecting Shaft 1 3/4 in, Headroom to Mounting Point 31/32 in, For Minimum Beam Height 4 in, For Maximum Beam Height 4 in, Includes Not Applicable, Minimum Radius Curve 31 1/2 in, Trolley Wheel Diameter 3 3/10 in, Trolley Wheel Material Plastic, Manufacturer's Warranty Length 2 yr