Components:Disc rotor Material:stainles steel Use:Mountain bike Weight:100gram Size:160mm,180mm Color:Silver SZ16*Material:stainless steel,UNS 420*Dual sides full grained,QT*Diameter:160mm*Weight: 100gram*Opition:160mm,180mmREMARKS:1.ISO9001 2000 &EN147662.High quality.Good advance technology and reliable performance.3.TUV certificate4.Competitive price and good delivery time