CALIDAKA Greenhouse Hand Crank Winch Self Locking Sidewall Manual Crank Winch Agricultural Sidewall Film Manual Roll Up Lifting Device Machine Window Opener for Greenhouse Ventilation Ranch

About this item Material: Mainly made of safe, strong and durable metal material for a long service life. Self-Locking: Self-locking and the automatic brakes hold the side walls in place. Features: Small size, low noise and easy installation, setting the limit on hoop house ventilation motors. Purpose: Sidewall Manual Crank Winch can help your greenhouse side and roof ventilation flourish and creates a better environment for plants. Application: Suitable for breeding greenhouses, flower greenhouses, connecting film greenhouses, fruit greenhouses.