Dinmension: Dia:50mm,75mm,100mm,115mm,125mm,150mm,180mm,200mm,230mm,250mm,406mm.or according to customer's requirements. Grain:Black Sillicon Carbide,Aluminum Oxide,Zinc-Stearate Coated,Zirconium. Coating Density:Close Coated,Half Open Coated Backing:Paper Base(B/C/D/E/F Weight Paper) Cloth base(X/J cloth) Grit Range:P24-P2000 Punching Model:No hole,1 hole,5 holes,6 holes,8 holes,16 holes,or according to customer's requirements.