Sold as a set of 4, these cage hole rails offer a secure and easy way to install and mount shelves and other accessories into your SOHO cabinet. Our mounting rails rails are offered in 3 heights: 8U, 12U and 24U to suit your specific SOHO cabinet with it’s corresponding height. This item features standard EIA compliant 1.75” RU spacing, marked and numbered on rails and is universally compatible with our M6, 10-32 or 12-24 cage nuts and mounting screws for ease of installation.