FeaturesAn easy to install toolless vented 19 in shelfMounts onto rack angles that have EIA spaced square holes (3/8 in)Shelf slides open and provides a variable sized, continuous surface for equipmentBack of shelf has oval cutouts for power and data cablesAccessory hole patterns at back of shelf fit small and large D-rings to help manage cableMade of steel with a 150 lb static load ratingRAL 9005 black colorSquare rack angle hole only