Spec Sheet Preview: The PO101S Postal Door Release Station provides for USPS Postal Lock installation and microswitch control of door release device(s). It is constructed of a rugged extruded aluminum panel with durable, flame retardant ABS plastic endcaps. The extrusion design provides sufficient depth to make the panel surface mountable with no additional housing required. A gasket is also attached to the rear surface to increase the station's resistance to weather exposure.