... hole mesh Stainless Steel,Aluminium,Galvanized metal,copper Round,square,hexagon,oblong,etc ISO9001 Perforated sheet/ Punching hole ... Low carbon steel sheetAluminum plateAluminum Zinc Steel sheetHole Shape:Round, Rectangular, Square, Triangle, Oval, Oblong, Slot hole, Pentagon, ... inches or millimeters. also can be expressed in gauge.Round Hole, 60° StaggeredRound Hole, 60°, StaggeredRound Hole, ...