Guide Wheel Closure Double Sealed Drive Type External Hex Duty Type Standard Face Design Plain For Environment Clean Room Extreme High Temperature Overall Length 1 29/64 in Roller Diameter 1 51/64 in Roller Head Type V-Groove Roller Material Alloy Steel Roller Width 5/8 in Rolling Element Rows 2 Seal Type Contact Stud Material Stainless Steel Stud Thread Size M12-1.75 Stud Type Concentric System of Measurement Inch Bearing Material Alloy Steel Bearing Material Grade AISI 52100