Crimped steel,brass plated ● 3301.07040 for 4” ● 3301.07050 for 5” ● 3301.07060 for 6” ● 3301.07070 for 7” ● 3301.07080 for 8” ● 3301.07100 for 10” ● 3301.07120 for 12”