The class B15 single leaf with high-class sound insulation adopts PVC plastered galvanized steel plate as the door material, and the interior is filled with rock wool to increase the fire resistance. The door frame is treated by electrostatic powder spraying process, and stainless steel is used as the threshold cover plate. Excellent sound insulation and optional escape hatch. This product is suitable for B15 fire rating, and the sound insulation effect has a certain requirement of the cabin. Its beautiful appearance is your best choice.