... ,115mm,125mm,150mm,180mm,230mm Velcro backing Silicon Carbide Velcro Disc Grain Backing Diameter X Hole sizeGrit No.SI. Velcro 36406080100120150180240280320360400VELCRO ... , 8 holes or customerizeInterface: velcro or pressure-sensitive adhesiveSize: 2", 3"”, 4", 4.5", 5", 6", 7", 9"Grit: P36-P1200 ...