Specifications of steel doors as follows:
1. Steel material: cold steel, metal no. 37
a. Outer material:
i. Door panel: steel 
ii. Door frame: steel
b. Inner material: honeycomb and fireproof cotton
2. Standard dimensions (in-wall size including door panel and door frame):
a. Height: 1,970/2,050/2,100/2,150/2,200mm
3. Steel sheet thickness:
a. Door panel sheet: 0.7/0.8/0.9/1.0/1.2mm
b. Door frame sheet: 1.5/1.6/1.8/2.0mm
4. Wall thickness: 12-14cm
5. Features:
a. Adopts high quality PVC steel board
b. PVC film is made under high temperature, no need to paint again 
c. Without formaldehyde toluol or radiation, safe and environmentally friendly
d. Dampproof, crack resistant, film, and shape keeping
e. Unique design: you can choose design, size, dimension, color, lock hole and shape of door frame; all doors can be installed promptly and conveniently 
f. Open side can be selected by yourself in order to suit your markets
g. Left open/right/inside/outside