... frequency quenchingCarburizationSurface treatmentSand blastingDull polishGalvanizationChrome platingPaintingElectrophoretic platingPackagingBlister card, Slide blister, Plastic bags, Carton, Vacuum packing, Sprockets and chain set box, or ... hardness and abrasion resistance4) Special surface treatment5) Competitive price competitive/high quality sprockets and chains for motorcycle IMG_0610