Zipp vuka clip riser kit zipps vuka alumina clip risers are designed for use with the vuka alumina clips above bar option the risers are designed offer a wider range of adjustability within the vuka alumina aero cockpit system the vuka alumina risers are designed for use only with the above bar system of the vuka alumina clip risers cannot be stacked includes hardware features laser etched graphics size 50mm colour high brushed black