... :0.3-10mmOpen area: 0.3%-63%Process: punchUse: Filter part, metal filter panelHole: round, square, diamondCharacter: winding-resisting, Ageing-resistingThe finished ... steel, stainless steel, aluminum steel, plywood, hipboard, density board, plastic film, etc. Hole shapes:Round, rectangular, square, triangle, hexagonal, diamond, lightly ...