... , metal key ring, stainless steel key ring, promotional gift key ring, key chain, promotional gift, metal key ring, stainless steel key ring · Materials: brass, iron, aluminum, stainless steel, zinc alloy, PVC, silicone ... thickness available· Available attachment: chain, snap hook, key ring, leather strip etc.· Color reference: pantone color chart or AOKI chart· Inner packing: 1pc/polybag ...