1) salt spray test: more than 72 hours
2) plating: 4 layers nickle+1 layer chrome,our thickness of nickle ≥28μm
3) warranty: 1 year
4) testing: 100% from product to packing
5) finish: chrome,zinc,blacking,dacromet,color electrophoretic ,black chrome and mucn more
6) grade: 6/8/10
www.wheelnutcn.com
email: hs01@wheelnuts.cn whatsapp: +8615961163336 skype: carrol.yang1