* Soundproof efficiency:can reduce noise more than 45dB;
* Multiple layers bonded, special soundproof structure, can suffer high temperature and air load.
* Excellent efficiency for waterproof, fireproof, impact resistance;
* Full steel structure can keep the door no deformation for long time;
* Soundproof efficiency ensure can keep 30 years no change;
* Can special order as customer’s requirement;
* Lead time is short: two weeks can finish.