100% BRAND NEW NEVER INSTALL, SOLD IN PAIRS. Rubber Bushing can expand from 15mm to 25mm, fit on 7/8" and 1" bars. Mounting bolt size is 8mm, if your bike have 6mm thread, please consider use exist part or extra 6mm bolt. Mirror surface 8mm (3") with smoke blue tinted. Will universal fit on Custom Bobber, Chopper, Cafe Racer, Cruiser.