Roller Wheel Closure Open Drive Type Hex Socket Duty Type Standard Face Design Hex Socket Overall Length 1 9/64 in Roller Diameter 1 1/2 in Roller Head Type Flat Roller Material Nylon PA Glass Fiber Reinforced Roller Width 15/32 in Rolling Element Rows 1 Seal Type Not Applicable Stud Material Carbon Steel Stud Thread Size 1/4 In.-20 Stud Type Concentric System of Measurement Inch Bearing Material Bronze Bearing Type Plain Drive Location Stud Features Includes Mounting Hardware