1) Filling material: honeycomb paper 2) Lock: special security lock, which consists of additional 13 locking points Standard sizes:2050*950,2050*860MM 1) Door leaf thickness: 70mm 2) Steel sheet of door leaf: cold rolled steel sheet 0.6~1.0MM 3) Steel sheet of door frame: cold rolled steel sheet 1.2~2.0MM FD-519 steel door