Side Film Manual motor roll up unit  for greenhouse

1. The shell is made of cast aluminum material, which adopts precision die-casting molding process;
2. With internal self-locking device, can be turned on and off at any position;
3, stainless steel, coating with galvanized inside, and spraying plastics outside, double rust protection;
4. When using in the small space, only need to install the crank in 2/3 of rocker, narrow its radius of gyration;
5. Reduction ratio and torque is designed reasonable, which is more efficient and more convenient.