... resistant nonferrous materials diam/holegritRPMhole patternpacking unit/pcscarton/pcs100x1616,24,36,40,50,60,80,100,12015150round hole25500pcs/carton 115x2216,24 ... ,30,36,40,50,60,80,100,120,150,180,240, ... 60,80,100,12012150round hole25500pcs/carton 178x2216,24,36,40,50,60,80,100,1208600round hole25500pcs/carton Zirconium fibre discs- round hole