... .Used for folding machine 2.Alloy steel. Paper cutting blade/perforating bladeperforating blade for folding machine.Materials can be selected alloy steel ... ,8,10,12,14,16,20,60,80. V-shapeU-shapeØ68mm*Ø45mm*0.5mmØ62mm Ø40mm*0.5mmØ53mm* Ø35mm ... 's samples or sample map made to order . paper cutting blade,perforating blade