High Soundproof Steel Door System
Thickness: 70mm, 100mm
Color: optional
Door type: single or double leaf
STC: 45-53db
Lock: enhanced type
Door frame: included
Materials: HPL/ Steel
Window: available
Opening way: swing
Connecting way: hinge
https://www.egmovablewall.com/acoustic-door/fired-rated-acoutic-door/high-soundproof-steel-door-system.html