Material of main equipment: Roller material: High grade NO. 45 forged steel, plated hard chrome on the surface of roller with thickness 0.05mm. Active shaft material: High grade NO. 45 carbon wrought steel at diameter 72mm. Cutting blade: Cr12 mould steel with quenched treatment. They are widely used as the roof of garden like factory, hotel, exhibition center, villa, civil construction, etc.
