Motorcycle 1''inch Spike Handlebar Risers for Kawasaki Vulcan 900 Classic Custom Chrome High Quality Billet Handlebar Risers Motorcycle Hole Diameter: 1"?Height from bottom to center of hole: 2 1/4"?Total Height: 5 1/4"?Width: 1 3/4" Bottom Thread Mount: 10mm Coarse,Bolts included: 10mm Coarse Thread 2 3/4" Length Condition: 100% Brand New ,Quantity:1 Pair (2 PCS),No include install instructor THIS SET IS MADE FOR 1 INCH HANDLEBARS ONLY,These are aftermarket risers and will not fit on some models,Inspect your bikes design and determine if these will fit before purcashing.,Bolts included - 10mm Coarse Thread 2 3/4" Length,Use the measurements above to determine if the risers will fit,No Installation guide