Roller Wheel, Closure Open, Drive Type Hex Socket, Duty Type Standard, Face Design Hex Socket, Overall Length 1 1/2 in, Roller Diameter 2 in, Roller Head Type Flat, Roller Material Nylon PA Glass Fiber Reinforced, Roller Width 23/32 in, Rolling Element Rows 1, Seal Type Not Applicable, Stud Material Carbon Steel, Stud Thread Size 5/16 In.-18, Stud Type Concentric, System of Measurement Inch, Bearing Material Bronze, Bearing Type Plain, Drive Location Stud, Features Includes Mounting Hardware