... Size: 100mm,115mm,125mm,150mm,180mm,230mm Fiber backing Grain Backing Diameter X Hole sizeGrit No ... . A.O. Fiber 162436406080100120150180240280320360400FIBER DISCS100MM/4.0"X16MM 115MM/4. ... and finished fast when you use this fiber disc. The products should be stored in ... kept in the package before operation.Application: Abrasive fiber discs for grinding welding, seams, removing rust, ...