This indoor/ outdoor polycarbonate cover helps protect devices such as dual action pull stations, keypads for entry systems, intercom stations, emergency buttons, electrical light switches, duplex plugs, etc. The strong, durable construction takes the toughest knocks while it guards against accidental or intentional physical damage. This Universal Stopper is a clear, flush mount cover. Other Universal Stoppers include a surface spacer with conduit knockouts or a waterproof Type 4X enclosed back box. The cover is also available with horn housing or message hood. The Universal Stopper is designed to comply with ADA and is less than 4 inches in depth. Universal Stopper has the same footprint as the Mini Stopper ;, but has a larger interior and can accommodate most dual action pull stations. Also known as -STI13000NC Enclosed Protective Cover, Polycarbonate-Safety Technology Inc. CLEAR UNIV STPR, FLSH MNT NOHS - SF-STI13000N-Covers: Safety Technology International Safety Supplies Universal Stopper withou