The steel fire door is non-toxic, tasteless, free of formaldehyde, toluene, radiation pollution, environmental protection and health, and is an excellent green environmental protection product. The steel fireproof door frame is perfectly combined with the door leaf, which is easy to install and is an economical product.

Deriyên agir ZHTdoors, 31 sal ezmûna hilberînê di deriyê agir û pencereyan de. Deriyên agir ên sereke yên UL, deriyên agir EN, deriyên agir BS EN, hwd.. Em xwedî sertîfîkayê ne.