Features 1. According to the standards of ISO90012000 2. The thickness of steel sheet of door leaf is 0.8-1mm; the thickness of steel sheet of door frame is 1.5mm 3. Door leaf thickness 50mm, 70mm 4. Filling materials rock wool 5. Lock security lock is made by Tri-Circle Group Co., Ltd. 6. Diversified designs and colors are available 7. Standard size