These Rapid Art High Rise Clip ons are manufactured from 304 stainless steel and finished in a high polish. They are re angled to 5 degrees these measurements are taken from the end of the clip on . They give you a 30mm rise are 50mm back closer to the rider and are 25mm wider. They are pre drilled for the switchblocks the OEM end weights are retailed and full fitting instructions supplied . No modifications are required to the fairings etc. Replacement bars are sold separately.