Most of the steel fire doors are treated by surface spraying. The wear-resistant parts such as pulleys in the steel fire doors are all high-quality hardware, which are of high quality and durability.

ZHTdoors fire doors, 31 years of production experience in fire doors and Windows. The main UL fire doors, EN fire doors,  BS EN fire doors, etc.,.We have certification.ZHTdoors support OEM and free design.Our advantages:good quality, factory price, good service.Welcome to consult us.