... Fork: 2mm, 2.5mm, 3mm3. CasterType: Swivel, Fixed, Swivel with brakeMounting: Top plate, Threaded stem, Grip stem, Bolt hole.Load Capacity: 50 ... Quiet SlidingExcellent FlexibilityExcellent Water ResistancePoor Grease Resistance Grey Rubber Wheel With Swivel Top Plate And Brake