... 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 12.7mm16,17,18 ... 19,20,213/4" x 3/4"19mm x 19mm16,17,18,19,20,211" x 1"25.4mm x 25.4mm15,16,17,18,19 ... 2",3/4",1"3.Width:2'-7'4.Length:10'-300'5.Packing:Moister-proof paper or PVC film6. ...