Two Greenhouse Sidewall Manual Plastic Film Rollup Hand Crank Winch for Greenhouse Ventilation, Plastic Side Window Roll Up Hand Crank

Description This crank casing is made of one piece cast aluminum. Inside are gears made of harden steel with bidirectional self locking mechanism. It is the most popular model on the market, every grower is using it. With this manual crank, you to roll up the greenhouse film easily and quickly, ensuring that the air in the greenhouse can circulate naturally and promoting the healthy growth of your plants. Use 3/4 inch EMT conduit to connect to the side wall (bolt screw included, conduit not included) Features: 1. The self-locking device can start and stop at any position 2. The cast aluminum shell and double-layer anti-rust paint are very durable and can provide excellent results even in harsh environments 3. The gear ratio of 4:1 can make you effortlessly roll up the side walls of the greenhouse, allowing you to properly control the ventilation and temperature of the greenhouse 4. The installation is very simple, which is suitable for most of your film ventilation roller blinds 5. The internal all-steel fittings are heat treatments to ensure durability Specification: Shell material: Cast aluminum + anti-rust paint Gear: stainless steel Maximum winding height: 1.7m Maximum winding length: 120m Speed ​​ratio: 4:1 Weight: 2.2kg Scope of application: Courtyard, garden, fruit, vegetable, plant, flower, livestock greenhouses Package included: 1* Manual Greenhouse Film Rollup Crank

• Self Locking; Automatic brake holds sidewall in place
• 4:1 Gear ratio for easy cranking
• Max. Roll Length: 295FT (90M)
• Weather and Rust resistant stainless steel handle, Plastic Resin Enclosure ensures longevity of gear
• Connects to sidewall with 3/4" EMT Conduit (Attachment Screws included / Conduit not included)