Class A fireproof doors are especially suitable for those occasions that require fine grinding before electroplating, excellent vibration, mirror polishing of hand tools, mirror polishing of electric heating tubes, etc. Although in terms of purchase cost, Class A fireproof doors are higher than Class B fireproof doors, but in terms of comprehensive use cost, Class A fireproof doors are better than Class B fireproof doors in many aspects.

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.