... Wire Mesh ISO9001:2000 Certification Aperture:1/4",3/8",1/2",5/8",3/4",1",2"etc... Material: 304 Stainless ... OpeningWire 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, ... x 5/8"16mm x 16mm18,19,20,21,3/4" x 3/4"19.1mm x 19.1mm16,17,18,19,20, ... 7mm x 12.7mm16,17,18,19,20,213/4" x 3/4"19mm x 19mm16,17,18,19,20,211" x ...