1.zinc alloy 2.double handcuff 3.for decorate 4.SGS report 5.FORM A available ... Size30mm inner diameter Weight9.25g UseageHandbag,gift box,case,computer bag, pet, beltTechnology Die-casting, PlatingLogo KTQC Salt fog test Acid ... ,pearl nickel environment-protection material, environment-protection plating P08 Metal Handcuff