Quick overview from the supplier:
19" 42U Standard Rack Metal Cabinet, NB6942, RAGW6942, 600*960*2000
Materail: cold rolled steel, Powder Coated, black,
Cabinet door: vent steel door
Cabinet standing rail steel: 2.0MM
Side door and Top steel: 1.2MM
Back door: 1.2MM, Shelf: 1.2MM