These are really chunky handlebar risers, cnc machined from billet aluminium. They are 21mm thick, 55mm deep, and hold the bars 75mm high. (the picture shows 50mm straight up risers, but these are 75mm and lean back towards the rider) The clamps use 2 x M8 stainless bolts (included) in each, and have single M10 mounting bolts in the bottom of each. This means they can be fitted to any yokes that use the typical 10mm fittings, or if you are turning your sports bike into a streetfighter, simply drill a couple of 10mm holes in your top yoke and bolt these babies on! A fraction of the cost of new yokes! Supplied in a machined finish. For 22mm (7/8") bars. Overseas buyers please email for shipping costs.