Greenhouse Manual Film Roll Up Unit Manual Film Roll Up Unit price The shell is made of cast aluminum material, which adopts precision die-casting molding process PRODUCT PARAMETERS ModelRoll HeightRoll LengthSpeed RatioFunction MF-2001.5m120m4:1roof vent Manual Film Reeler FEATURES 1. The shell is made of cast aluminum material, which adopts precision die-casting molding process; 2. With internal self-locking device, can be turned on and off at any position; 3. Stainless steel, coating with galvanized inside, and spraying plastics outside, double rust protection; 4. Reduction ratio and torque is designed reasonable, which is more efficient and more convenient. 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.