Crimped steel,brass plated,red steel cover ● 3301.01310 for 3”xM10 ● 3301.01314 for 3”xM14 ● 3301.01410 for 4”xM10 ● 3301.01414 for 4”xM14 ● 3301.01514 for 5”xM14 ● 3301.01516 for 5”xM16