Twisted steel,natural steel cover ● 3301.05310 for 3”xM10 ● 3301.05314 for 3”xM14 ● 3301.05410 for 4”xM10 ● 3301.05414 for 4”xM14 ● 3301.05514 for 5”xM14 ● 3301.05516 for 5”xM16