1. Driver: 304 stainless steel shell, including safety protection device and overload protection device;

2. Stainless steel shell and high-strength nylon shell are available at the corner;

3. The inner corner of the corner wheel is made of cast iron with high strength to avoid deformation during long-term operation;

4. It contains upper and lower sealing strips to ensure that the feed in the corner will not deteriorate due to water;