- Universal Fit Most of Rackmount Chassis and Equipment - Fully Adjustable Rails. Mounting Rails are Horizontally Adjustable to Ensure the Best - Fit of Rack-mount Chassis - Optional Side Panels - Optional Front/Rear Doors - Locking Mechanism Design on Casters WX Series 4-Post open frame rack is built with high-quality aluminum/steel structures. This stylish 19" rack-mount cabinet protects your investment in computer equipment against environmental elements heat. WX series comes with castors and leveling feet help moving and setting equipment easily to any location. It is a flexible and cost-effective solution for rack-mount devices.