The RackSolutions 1U Cobra 155-A Dry Slide Rail is specifically designed for Dell PowerEdge R210 and R240 short depth servers, making it the ideal solution for shallow depth racks. Unlike OEM Dell rails, this rail kit offers compatibility with square, round, and threaded hole racks, allowing flexibility for various server environments. Built with 18 Ga galvanized steel, the dry slide rails ensure smooth operation and durability, providing a long-lasting solution for IT professionals. With support for both 2 post and 4 post racks, the Cobra 155-A rail is a versatile option for data centers with limited rack depth.