Metal Bra O-ring: 1) Material:iron, brass, alloy 2) Color and size change available 3) Plating or coated 4)MOQ:10000 Metal Bra O-ring:1) material: iron,brass,zinc alloy2) different color and size are available3) Customer's design is welcomed4) hook & eye widely used for garments5) FOB shanghai or ningbo Metal Bra O-ring