Safety Technology International, Inc. STI-6200 Fire Extinguisher Theft Stopper, Alarm Helps Prevent Misuse,Safety Technology Intl,STI-6200" /> Alarm helps stop theft, vandalism or misuse to fire extinguishers Highly visible red STOP sign design discourages wrongful use of extinguisher Virtually indestructible polycarbonate housing Compact patented design 5" in diameter x 1.875" deep Deactivation cable provided for service by authorized personnel