• Light weight.

  • All locking devices and hinges have undergone stringent fatigue test exceeding 250,000 cycles against sagging.

  • In locked position, the door leaf is secured by one strong lockset, 4 locking pins and 4 shear pins. All pins are made of grade 316 stainless steel with bronze bushes.

  • Door and ventilation sleeves are air tight and water proof.

  • Door leaf and frame are made of steel, and cathodic-electro-deposition painted to provide maximum protection against rusting.