packaging machine carton knife cigarette making machine knife, packaging industry knife Material: Carbide Size: OD310xID220x3 packaging machine carton knifecigarette making machine knife, packaging industry knife Dimension Tolerance: OD±0.5mm,ID+0.05mm,thickness±0.03mmPitch Dimension: Φ235mm±0.2mmSurface roughness of egde:Ra0.2um