... (Bending), Inspection, PackingTechnical standardsSpecificationHoles distanceFin typeExpansion abilityΦ 721×12.7isoceles triangle shapeV wave fin, Slit fin, louver fin6Rows, 36HolesL: 1800mm(max ... Fin pitch:1.2 1.9Φ 7.9422×19.05equilateral triangle shapeV wave fin,Louver fin4R, 36HL: 1200mm(max)Fin ... pitch:1.2 2.0Φ 9.5225×21.65equilateral triangle shapeFlat fin, Slit fin, V wave fin6R, 44HL: 2500mm ...