STI’s Stopper II contractor pack kits include six complete covers in one package. Each protective polycarbonate cover helps stop false fire alarms without restricting legitimate use. The contractor six-pack offers less waste with minimal cardboard and paper used for packaging. The pull station protective covers mount directly to the wall over an existing pull station, helping to prevent false fire alarms while also guarding against vandalism and damage. The contractor’s six-pack is offered in several options: STI-1100CP6 — stopper II with horn, flush mount; STI-1130CP6 — stopper II with horn, surface mount; STI-1200CP6 — stopper II without horn, flush mount; STI-1230CP6 — stopper II without horn, surface mount; and STI-3150CP6 — weather stopper without horn, with gaskets, surface mount. All are designed to meet the requirements of IP54. All covers are UL/cUL listed, ADA compliant.