STI-1230 Stopper II without Horn with Spacer

This unique and patented device has been helping stop false fire alarms around the world for more than 20 years, without restricting legitimate alarms.

Stopper II consists of a clear, tamperproof, super tough polycarbonate shield and frame that fits over manual pull stations. Additional models are available with a built-in warning horn that sounds when cover is lifted to gain access to the pull station (see STI 1100).