Material: 4140 Chromoly, liquid heat-treated with replaceable nylon/fiberglass sleeve Drilling: for 14mm axle, adapter included for 3/8" Diameter: 1.42" / 36mm Length: 4" / 101mm, 4.5" / 114mm Extra info: sold as single, low friction nylon/fiberglass for faster grinding, small diameter plastic peg Weight: 190 g