Our industrial (21g 9/64") mesh weighs 0.73 lbs/sq.ft. (3.56kg/m2). The rings used in this mesh have an outer diameter of 0.215 inches, an inner diameter of 0.149 inches and a wire diameter of 0.028 inches. The industrial mesh has approximately 7216 rings/sq.ft. The industrial rings are approximately the same size as the medium rings, but with thicker wire. The thick wire combined with a smaller ring size makes the industrial mesh our strongest chainmaille ever.