... metal sheet (factory) Types: Round, Square,Rectangular etc Holes size: 0.020"-5" ... smooth, durable3> Conventional hole: round hole, long round hole, square hole, rectangular hole, triangle hole, six-hole, plum blossom hole, fish-scale hole, holes, etc. ... steel punching metalplatesThicknessaperturepitchlengthwidthPunching rate%weightStainless steel punching hole mesh0.5111219.63.140.81.51.51219 ...