The Ready Rails&132;&162; sliding rail kit for 1U Systems, including the Power Edge R415 & R310 provides tool-less support for racks with square or unthreaded round mounting holes including all generations of Dell racks. They also support tooled mounting in 4-post threaded racks via an optional adapter brackets kit. The optional cable management arm (CMA) can be mounted on either the left or right side of the sliding rails without the use of tools for fast & easy deployment. Feature Feature Value Type Rack rail kit Product colour Silver Rack capacity 1UCompatibility Power Edge R320n Power Edge R420n Power Edge R620n Power Edge R630n Power Vault DL4000n Power Vault DX6104 CSNn Power Vault DX6104 SCNn Power Vault DX6104 SN