This tough, clear polycarbonate cover helps dramatically to extend the life and reliability of weather exposed manual pull stations, push buttons and similar devices as well as protect them in harsh indoor conditions. Using the same super tough cover as the Stopper II device but without the warning horn, it is especially useful in increasing the lifespan of units in saltwater areas or other severe environments. STI-1250 is for flush mounted units. Weather Stopper carries a lifetime guarantee against breakage in normal use. BecauseThis strong, durable cover can take the toughest knocks, it also guards against physical damage and thereby helps reduce false fire alarms. It is UV-stabilized and in addition protects against dust and grime.