Montech AIR 903 BASE Midi-Tower Case with window, Black

The Montech AIR 903 BASE is a Midi Tower case engineered for high-airflow configurations. Its internal layout is designed to support a wide array of high-performance components, with compatibility for motherboards up to the E-ATX form factor. The chassis construction combines steel and plastic, with a tempered glass side panel for a clear view of the internal hardware. This design provides a solid foundation for building a system focused on thermal efficiency and component visibility.

For cooling, the case comes equipped with three 140mm PWM fans, two at the front for intake and one at the rear for exhaust. This setup can be expanded with additional fans or liquid cooling systems, with mounts for up to 360mm radiators on both the front and top panels. Component clearances are substantial, allowing for CPU coolers up to 180mm in height and power supplies up to 240mm long. Features such as integrated dust filters and dedicated cable management channels are included to facilitate a clean build and system maintenance.

• Midi Tower form factor supports E-ATX, ATX, Micro-ATX, and Mini-ITX motherboards
• Constructed with a steel frame, plastic elements, and a tempered glass side panel
• Dimensions measure 230mm x 493mm x 478mm (W x H x D)
• Includes two 140mm PWM front fans and one 140mm rear fan pre-installed
• Supports up to three 120mm or 140mm fans in both the front and top positions
• Accommodates 360mm liquid cooling radiators in the front and top panels
• Offers clearance for CPU coolers up to 180mm and PSUs up to 240mm
• Provides five 2.5" drive mounts and two 3.5" drive bays
• Equipped with 7 horizontal expansion slots for add-in cards
• Front I/O panel with 2x USB 3.2 Gen 1 Type-A, 1x USB 3.2 Gen 2 Type-C, and one audio jack