... *Specifications: 1.5 m x 30 m, 1.8 m x 30 m. *Opennig: 2'' x 2", 2" x 3", 2" x 4", 3" x3", 4" x 4" *Wire diameter ... In inchIn metric unit(mm)1/2" x 1/2"12.7mm x 12.7mm16,17,18,19,20,213/4 ... " x 3/4"19mm x 19mm16,17,18,19,20,211" x 1"25.4mm x 25.4mm15,16,17 ...