... extruder 2.Smoothing surface,beautiful appearance,innocuity, mildew-free, no cracking and bend PVC board extruder 1.PVC ... roller calendar. Then smoothing surface, beautiful appearance, innocuity, mildew-free, no distortion, no cracking and bending structure are available ... and can be processed as wood materials. Fit for ad lettering materials, architecture, decoration materials, door and window ...