RM24100 accommodates a mix of external 1 x 5.25, 1 x 3.5", internal 2 x 3.5", 2 x 2.5" bays. Its modular design further offers the flexibility in rear window and drive bay configuration. Users can choose to adopt a filter-equipped front door to avoid dusts and powders absorbed during industrial operation."Motherboard Supported: ATXNumber of Fans Supported: 3Number of Fans Installed: 1Number of External 5.25 Bays: 1Number of External 3.5" Bays: 1Number of Internal 3.5" Bays: 2Number of Total Expansion Bays: 6Front USB: YesNumber of Power Supplies Supported: 1Number of Power Supplies Installed: NoMaterial: SteelMaterial: Acrylonitrile Butadiene Styrene (ABS)Compatible Rack Unit: 2UForm Factor: Rack-mountableHeight: 3.5"Width: 16.9"Depth: 18"Weight (Approximate): 15.28 lbPackage Contents: 2U Feature-advanced Industrial Server Chassis1 x Cable For display and control switch, 800mm1 x AC-IN Cable2 x USB 2.0, 750mm1 x Bracket For PS2 PSU1 x 3.5" HDD holder1 x 2.5" HDD holder1 x 1 x 5.25" + 1 x 3.5" drive bay1 x Single carton with Chenbro logo1 x 2-door type front door with key lockPackage Contents2U Feature-advanced Industrial Server Chassis1 x Cable For display and control switch, 800mm1 x AC-IN Cable2 x USB 2.0, 750mm1 x Bracket For PS2 PSU1 x 3.5" HDD holder1 x 2.5" HDD holder1 x 1 x 5.25" + 1 x 3.5" drive bay1 x Single carton with Chenbro logo1 x 2-door type front door with key lock"