1.Materil: brass, iron,copper,zinc alloy 2.Price:about $0.37 as difference qty and szie 3.Plating: nickel ,gold,brass, Tie bar features:1) Materials: brass, zinc alloy, stainless steel, iron, pewter, aluminum2) Plating: gold, anti-gold, pearlized gold, silver, anti-silver, pearlized silver, nickel, anti-nickel, pearlized nickel, black nickel, anti-brass, anti-copper, chrome , dyed black , ...