Useful in Your Greenhouse UYGALAXY, the expert for greenhouse ventilation. Originality- Meets your greenhouse needsConvenience- Easy use, ease your workEnjoyment- Easier solutionQuality- We constantly strive for excellenceConcern- UYG cares about what you care UYGALAXY Greenhouse Sidewall Hand Crank for Ventilation Sidewall Ventilation & Self Locking & Rust Resistant It is used extensively in the greenhouse, such as the solar greenhouse, vegetable greenhouse, cultivation greenhouse, multi-span film greenhouse and other assembled greenhouse, by which to open or close the side windows through the roll of film. Apply on: Greenhouse Sidewall Max Roll Bar Length: 393ft(120m) Suggest Roll Up Height: 4.9ft(1.5m) Suitable Climbing Tube Size: 1inch(OD 25mm) Long Lifespan: Weather and rust resistant stainless steel handle, plastic resin enclosure ensures longevity of gear. Durable Material Dual rust resistant body45# International steel gearPolyethylene handleFor greenhouse without power, a startup for self-sufficient homestead Self Locking Automatic brake holds sidewall in placeSelf lock inner gear and device, the roll bar stops as you wishRecommend 1 inch (25mm) OD climbing tube for use Threaded Handle Anti-slip threads does not slip when use4:1 gear ratio for easy crankingRoll 4 circle hand crank, roll up film tube 1 circle Small Space Also designed for small spaces, extra hole in the 2/3 of handle arm. Vegetable & Herb Fruit & Flower Poultry & Livestock UYGALAXY Greenhouse Side Curtain Ventilation The package includes: 1* Main body1* Handle2* Nut set UYGALAXY Greenhouse Side Curtain Ventilation The package includes: 1* Main body1* Handle2* Nut set