15U- RMU Number Markings on Rails for Easy and Fast Installations- 18In. Depth, Used with All 19In. Wide EIA Equipment- Supports up to 125lbs. of Equipment When Properly Mounted and Secured- Made with #12-24 Threaded Rack Rails- Self-Alignment Square Design for Fast Assembly- Rugged Heavy Duty Steel Construction- Black Textured Powder Coated