Feature: Old school flanders style "spear" 4 inch rise offset dog bone riser set For 1" diameter handlebars Comes with a basic medium shine factory polish - these will show some machining marks, casting inclusions, and minor imperfections Will dull with age to a cool old polish, or can be polished and clear-coated, or bead-blasted down flat, as desired These will be a tight fit on 1"bars, so if you have powdercoated or slightly oversize bars you may have to slightly enlarge the 1" opening to suit Specification: Material: Heavy billet aluminum Color: Polish Handlebar hole diameter: 1"(25.4mm ) Total dimension: 16cm*10cm*5cm Fitment: Universal fit for most with 1"(25.4mm） handlebar clamp Package Included: 1 Pair handlebar riser Instruction not included.