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PC CASE · VERIFIED EXACT WAVE 01 COMPONENT

Montech
AIR 903 MAX Black

The black AIR 903 MAX is the high-airflow large-build option in this wave: four 140 mm fans are included, GPU clearance reaches 400 mm and both the roof and front take 360 mm radiators. Its capacity comes with a larger 493 mm-tall chassis.

Reference: Verified exact modelMPN: AIR 903 MAX BlackFormat: E-ATX / ATX / Micro-ATX / Mini-ITXDimensions: 478 × 230 × 493 mmGPU clearance: Up to 400 mmCPU cooler clearance: Up to 180 mm
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Montech AIR 903 MAX Black
MODEL PHOTOExact model shown
Best forLarge high-power GPUs and tall air coolers
Also strongBuilders who want strong stock airflow without immediately buying fans
Main limitPhysically larger than compact mainstream cases
Check firstE-ATX width can cover cable-management openings
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VERIFIED EXACT WAVE 01 SHEET

Identity, specifications, compatibility and buyer guidance

Confirmed specifications

  • MPN: AIR 903 MAX Black
  • Format: E-ATX / ATX / Micro-ATX / Mini-ITX
  • Dimensions: 478 × 230 × 493 mm
  • GPU clearance: Up to 400 mm
  • CPU cooler clearance: Up to 180 mm
  • PSU clearance: ATX up to 240 mm
  • Radiator support: Top/front up to 360 mm
  • Included fans: 3 × 140 mm ARGB PWM front + 1 × 140 mm PWM rear
  • Front I/O: USB-C, 2 × USB-A, audio

Checks before buying

MPN: AIR 903 MAX Black

Amazon.ca ASIN: B0CB26ZFKV

  • Physically larger than compact mainstream cases
  • E-ATX width can cover cable-management openings
  • A front radiator reduces the maximum GPU envelope

Good choice for

  • Large high-power GPUs and tall air coolers
  • Builders who want strong stock airflow without immediately buying fans

Real limitations

  • Physically larger than compact mainstream cases
  • E-ATX width can cover cable-management openings
  • A front radiator reduces the maximum GPU envelope

Alternatives

  • Corsair 4000D Airflow for a smaller conventional ATX build
  • NZXT H6 Flow for dual-chamber presentation
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Product and media sources · checked August 28, 2026Official manufacturer sheet →Exact-media source →

Other useful details

Additional checks

  • A front radiator reduces the maximum GPU envelope
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