Greenhouse Hand Winch 4m/6m Chains, Greenhouse Manual Film Coiler Device, Top-Walls Greenhouse Shed Use, New Farm/Vegetable Greenhouse Ventilation Equipment, 2pcs

Our top-walls greenhouse hand winch uses a 4m6m long chain. Through the cooperation of sprocket and pulley, you can roll up the film conveniently and quickly to ensure that the air in the greenhouse can circulate naturally and promote the healthy growth of plants. This is a simple way to manual operation roll up the film of the greenhouse Features: 1. The gear ratio of 4: 1 can make you effortlessly roll up the internal and external roof membrane of the greenhouse, allowing you to properly control the ventilation and temperature of the greenhouse 2. Two-way self-locking performance saves time and effort 3. The installation is very simple, which is suitable for most of your film ventilation roller blinds 4. The extension chain solves the problem that the greenhouse is too high and the manpower cannot control it, making it easier to roll the film 5. The cast aluminum shell are very durable and can provide excellent results even in harsh environments Specification: Color: red + blue Shell material: Cast aluminum Pulley: stainless steel Maximum winding length: 70m Speed ​​ratio: 4:1 Chain length: 4m6m Scope of application: garden, fruit, vegetable, plant, flower, livestock greenhouses Package content: 2 × Greenhouse ventilation equipment If you have any difficulties, please contact us in time and we will serve you as soon as possible

• Upgrade greenhouses hand crank winch: Our greenhouse ventilation winch is suitable for high greenhouses. It uses high-quality chain operation with a length of 4m/6m, which solves the problem of too high roof and uncontrollable manpower. Extending the chain makes it easy to roll the film and makes life more convenient!
• Self-locking device: The film rolling blinds machine has a self-locking function inside, which can start and stop at any position. You can fix the height of the greenhouse at the required position without others helps. It can be done easily by one person
• High-quality accessories: 1.Stainless steel pulleys can quickly and smoothly roll up the greenhouse film, saving time and effort; 2.High-quality chains are not easy to rust, and have a long service life; 3.Stainless steel accessories, professional heat treatment, stable and durable; 4.Large speed ratio ( 4:1), high output torque
• Aluminum alloy body: The practical shell is made of cast aluminum, using precision die-casting technology, one-time molding, not afraid of the sun and rain, the shell design is firm; and the surface adopts double-layer anti-rust process, the surface is galvanized inside and sprayed, it is not easy to paint off
• Widely used: Our greenhouse film winding device is small in size, low in noise, simple and convenient to install, which can help your greenhouse and roof to ventilate, flourish, and create a better environment for plants. Suitable for breeding greenhouses, flower greenhouses, multi-span film greenhouses, fruit greenhouses, etc. Maximum winding length: 70m