(1) material :zinc alloy (2) plating:anti -nickel (3) 5-8 days sampling (4) 15 days ... alloy injection,photo-etched,offset print,silk screen print,laser engrave.Plating :nickel,gold,brass,chrome,bronze,black nickel,silver,pearl nickel,anti-nickel ... .Material :zinc alloy,iron,brass ,copper,aluminum, ...