Track Roller Bore Diameter 1 3/4 in Closure Double Sealed Duty Type Standard Overall Length 2 7/8 in Roller Diameter 5 in Roller Head Type Flat Roller Material Alloy Steel Roller Width 2 3/4 in Rolling Element Rows 1 Seal Type Contact System of Measurement Inch Bearing Material Alloy Steel Bearing Material Grade 52100 Bearing Type Needle Roller Dynamic Radial Load Capacity 49 750 lbf