Double-sided embossing nut with Zinc and black Plating Material: Carbon And Solly SteelSize: M3 to M48plantings:Black, Oxide, Zinc, Chrome, Galvanizegrade: 4,6,8,10Length: According To The RequirementsPacking: Box Or Bulked In Carton ;PalletCustomized Packing Is Accepted Double-sided embossing nuts