Track Roller Closure Double Sealed Drive Type Slotted Duty Type Heavy Face Design Screwdriver Slot Overall Length 58 mm Roller Diameter 40 mm Roller Head Type Crowned Roller Material Alloy Steel Roller Width 20 mm Rolling Element Rows 1 Seal Type Non-Contact Stud Material Steel Stud Thread Size M18-1.5 Stud Type Concentric System of Measurement Metric Bearing Material Alloy Steel Bearing Material Grade AISI 52100 Bearing Type Cylindrical Roller Drive Location Stud