Depth = 800 mm: Many wall-mount 15U models are 600×600 depth. Confirm the depth of 800 mm is offered and supported for wall-mount.

Height = 855 mm: Confirm the height is ~855 mm (matching 15U) and that internal usable space aligns with 15U.

Wall mount suitability: Verify wall mounting strength given 800 mm depth.

Front door, side panels, accessories: Check door type (glass/vented), side panels, cable access, fan/shelf/PDU options.

Brand & model: Perla Rack