Red 5-1/2" square fire alarm notification boxes with 1/2" knockouts are used to mount speakers, strobes, and other life safety devices on walls and ceilings. Garvin Industries’ fire alarm boxes have an extra wide and deep design that fits most fire alarm devices while allowing extra deep devices to also fit perfectly. They have a 97.5 cubic inch wire capacity and versatile knockout configuration. These boxes may be surface mounted or attached to various industry straps and hangers. They are painted red to easily distinguish them as fire alarm circuits.