... material 3.OEM/ODM service 4.use for light tube 5.any color is ok *PRODUCT DETAILS ... ST-366 LIGHT TUBE BUCKLES1) Materialiron2) ColorsNickel/nickel free, anti-brass ... , anti-copper, gun metal, light pewter, dull-nickel, nickel free dark pewter, nickel free ... light pewter, nickel free dull-nickel, and more3) ...