1. Make a PET
2.Protect inside and outside angles with the plastic
3. Closed silicon steel with special rust-proof paper
4. Closed with plastic film
5. Protect Guard Angle and end plate for inside and outside corrugated paper
6. Inside and outside steel end plate and angle protection
7. All-round to 3 path, Radial to 4 path
8. Washer for lock
