The Universal Stopper (STI-13200NC) is an indoor/outdoor cover for surface mount. It offers protection against physical damage (both accidental and intentional), dust and grime, as well as severe environments inside and out. Indoor/outdoor Stopper is a clear, surface-mount cover with a clear conduit spacer. It is sized to fit most pull stations and has a high-strength continuous hinge. Designed to comply with ADA, it is less than 4 in. deep. Other mounting options include a flush-mount cover or a waterproof Type 4X enclosed back box. The cover is also available with a horn housing or message hood available in several colors. STI offers a three-year guarantee against breakage of polycarbonate in normal use.