Colour Family: GREY Weight Capacity: 400 LB Material: STEEL Size: N/A Assembled Product Length: 5.75" Assembled Product Width: 3.5" . Wheels: 2 1/8" diameter formed steel Bearings: cold rolled steel, rollers Apron: formed steel, vertically adjustable, 5 3/4" long x 3.5" wide Pendant: 1/2" diameter, steel Door thickness: 1 3/4" to 2.5" Wheels and frame, satin coat steel, apron galvanized; pendant cadmium plated Capacity: 1 pair for maximum door weight of 400 lb INCLUDES: 2 x carriage bolts (5/16" diameter x 2-1/4" long 4 x flat head stove bolts (5/16" diameter x 2-3/4" long) Carriage bolt (5/16" diameter x 3/4" long)