Track Roller Closure Double Sealed Drive Type Hex Socket Duty Type Heavy Face Design Hex Socket Overall Length 3 1/4 in Roller Diameter 2 1/4 in Roller Head Type Flat Roller Material Stainless Steel Roller Width 1 1/4 in Rolling Element Rows 1 Stud Material Stainless Steel Stud Thread Size 1-1/8 In.-12 Stud Type Concentric System of Measurement Inch Bearing Type Needle Roller Drive Location Head