The thickness of UL steel fireproof door leaf is divided into three standards, namely, A, B and C, with excellent sound insulation and heat insulation performance. The surface of UL steel fireproof door is treated by electrostatic spraying, and the vulnerable parts such as hinges, door locks, door closers are high-quality products. The switch is light and durable.

ZHTdoors防火门，31年防火门窗生产经验。 主营UL防火门、EN防火门、BS EN防火门等。我们有认证。ZHTdoors支持OEM和免费设计。我们的优势：质量好，出厂价，服务好。欢迎咨询。