The SRFILTER comes prefabricated and ready to install in standard 48U rack enclosures on the inside of the door. Vertical hook-and-loop strips will need to be trimmed accordingly to accommodate 45U, 42U and 25U enclosures. When a filter becomes dirty or worn from use, be sure to replace it. The pieces can remain attached to the door with no need for replacement. Prevents dust and particle buildup on equipment installed in standard SmartRack enclosure Facilitates hot-aisle / cold-aisle data center configurations Comes ready to install in our standard 48U racks Vertical hook-and-loop strips must be trimmed accordingly to accommodate 45U, 42U and 25U enclosures