particle board/chip board 1 size 4'x8', 3x7x44/54/64mm, 2 thickness from 34mm~64mm 3 ... proof particle board or door co particle board/chip board1 size 1220*2440mm, 2135x915mm, 1220x2135, 1830x2440, 1830x3000mmMaximum width: 8feet, maximum length ... , fire retard chipboard: 30minutes, 60minutes, 90 minutes, 120 minutes big size chip board big size particle board flake board fire board