
Manual Hand Roll Greenhouse Film Winder for Optimal Airflow. Premium Material Construction: Crafted from cast aluminum and 45# GB steel with heat treatment for durability. Self-Locking Mechanism: Innovative two-way self-locking device allows effortless pause and resume control. Rust-Resistant Interior: Features galvanized finish with dual-layer rust-resistant coating and stainless steel parts. Compact Design: Hole at 2/3 length minimizes turning radius for ideal compact installations. Smooth Operation: Meticulously engineered speed ratio and torque ensure seamless user experience. Customizable Packaging: Tailored packaging options including bags, cartons, and pallets available. Korean Design Style: Sophisticated design inspired by Korean engineering standards. High Standard OEM: Meets high standard requirements with aluminum or steel gear options.