CLSR14U is a pair of 19-inch panel rails with square mounting holes, sized for 14U of EIA rack space. It is listed as an additional optional mounting rack rail for the Hammond CLC Series multi-bay colocation server rack cabinet, making it a practical choice for colocation providers, service providers and enterprise IT teams that need to add or replace equipment mounting rails inside a segmented cabinet bay.

The rails are formed from mild steel and finished in painted thin film black. Each rail carries 0.38 in square holes on typical EIA spacing, so standard 19-inch rack equipment using square-hole cage nuts and rack screws can be mounted. White silkscreened U markings are printed on the rails to help installers count rack units and position equipment accurately during build-out and later moves, adds and changes.

Mounting height for the pair is 24.50 in (622 mm), equal to 14U; the part drawing gives an overall rail length of 24.53 in (623 mm). Within the CLC Series ordering data, the 14U rail height corresponds to the per-bay rack space of the three-bay cabinet configurations, and the short description for CLSR14U is "3B PNL RAIL 24" SQ HOLE."

CLSR14U is manufactured in Canada and is RoHS and REACH compliant, USMCA compliant, and covered by UL file E474597. Standards listed for the part are cULus, PCI and TAA-compliant. A 10-32 tapped-hole equivalent in the same 14U height is offered as CLTR14U for installations that use tapped rails instead of square-hole rails.