The Middle Atlantic WRK-RR40 is a pair of 40RU heavy gauge rackrails with 10-32 threaded screw holes. These steel rackrails are designed for use with the WRK Series Racks. They come with a protective e-coating to ensure durability and longevity. Additionally, they conveniently mount inside the standard WRK series enclosures from Middle Atlantic, making installation of equipment straightforward. If you're setting up a rack system, these rackrails provide a sturdy and reliable solution for organizing your equipment.The Middle Atlantic WRK-RR40 is a pair of 40RU heavy gauge rackrails with 10-32 threaded screw holes. These steel rackrails are designed for use with the WRK Series Racks. They come with a protective e-coating to ensure durability and longevity. Additionally, they conveniently mount inside the standard WRK series enclosures from Middle Atlantic, making installation of equipment straightforward. If you're setting up a rack system, these rackrails provide a sturdy and reliable solution for organizing your equipment.