Greenhouse top ventilation manual film roller winch roller ventilation roll up Manual Film Reeler Our plastic film is supplied in a wide range of thickness and widths. PRODUCT PARAMETERS Roll HeightRoll LengthSpeed RatioFunction 1.5m120m4:1Roof Vent 1.5m120m4:1Side Vent Greenhouse Manual Film Roll Up Unit FEATURES Good Heat Preservation Double High Light Transmittance and Transparency We supply highly advanced, long-lasting multi-layer photo selective Greenhouse Plastic Film for use in greenhouse and tunnel covering applications. New technology in the production allows our Plastic Products to provide a full range of product features. Our plastic film is supplied in a wide range of thickness and widths. We can design and install farming and planting greenhouse for you according to your needs. You can choose single span greenhouse or multi span greenhouse, or contact us directly for the latest design! The main sales greenhouse accessories:Electric Roll Up Unit, Lock Channel, Lock Spring Wire, Rack Pinion, Greenhouse Film, Manual Film Reeler For more information about the Greenhouse Accessories, please click here.