Ultra heavy gauge steel. Will not bend or deform. Precision cut mounting slots for quick, easy and secure mounting. Vent slots allow unobstructed air flow from power supply cooling fans. Warranty: two year limited. Made from metal. Black powder coated finish is scuff resistant. 18.9 in. L x 7.3 in. W x 3.4 in. H (7.7 lbs.). The 2U plate has rack shelves that can be used with any combination of Samlex SEC desktop power supplies, providing a modular configurable system that can been interchanged by the user as needed. The two shelf SEC-R2 rack can also be used to bundle an SEC Power Supply with a mobile radio, DC-AC inverter or even a battery pack.