Billet spacers that add height to Thrashin Supply risers without replacing them. If the risers are right but the bar is an inch low, this is the cheaper fix. The spacer stacks under the existing riser and ships with the longer grade 8 hardware the taller stack needs. Features Made specifically to fit Thrashin Supply risers Machined from 6061 billet aluminum Made in the U.S.A. Specifications Ships with 3-1/4 inch grade 8 steel 1/2 inch by 13 head screw, the same thread as the risers, zinc yellow chromate plated Grade 8 washer to match Fitment Thrashin Supply handlebar risers Note: Different bolts are needed when these are paired with the Road Glide or Street Glide adapter plate, a billet Road Glide top tree, or a billet Softail top tree. About Thrashin SupplyThrashin Supply Co. machines its billet parts from 6061 aircraft grade aluminum in the United States, much of it in Los Angeles. The line is built around controls, risers and foot hardware for riders who want the touch points on a Harley-Davidson to feel deliberate instead of stock.Works WithThe risers these stack under: Hole Shot Risers, Pull Back Handlebar Risers, Straight Handlebar Risers and the Straight and Pull Back M8 gauge cut out versions. Tighten the whole front end with Solid Riser Bushing Kits.