... oxidation-resisting.Uses:it is used in industry,agriculture building,transporantion,mine,court,lawn,breeding,for,fence ,decoration ,machine, protection etc.Welded ... DiameterIn inchIn metric unit(mm)1/4" x 1/4"6.4mm x 6.4mm22,23,243/8" x 3/8"10.6mm x 10.6mm19 ... ,20,21,221/2" x 1/2"12.7mm x 12.7mm16,17 ...