KLLsmDesign Greenhouse Sidewall Manual Film roll up Hand Crank Winch for Greenhouse Ventilation (Blue)

?????Classic style?Typical side roll model in the market, suitable for most greenhouse in the field, easy to add or replace the accessories by yourself, 4:1 Speed gear ratio, save your energy, save your time. ?????All weather applicable?Anti-rust surface ensure our product can work in the condition of all weather. Not only help you to protect plants from rainning day, snowing day, also help to ventilate in the summer. ?????Durable quality?Aluminium alloy shell, weight 4.63 Lbs(2.1kg) including handle, internal precision stainless steel gears covered firmly , listen to the sound when you spin the handle, it works smoothly and no need to add engine oil after long term used. ?????Safety guaranteed ?Self locking, automatic brake holds , max roll length 393 FT(120m), roll height 4.92 FT(1.5m), water proof, shock proof. ?????Easy set up?Friendly to both starters and professionals . 0.86 or 0.98 Inch steel pipe both applicable , you can also use the same size pipe as film roll conduit.