This is a close up of two different indoor sprinkler fuse heads. Once a certain temp is reached, the liquid breaks the glass &turns the sprinkler in to put out a fire. I think they're interesting&look cool beside the wood cut outs.

Stock photo: This is a close up of two different indoor sprinkler fuse heads. Once a certain temp is reached, the liquid breaks the glass &turns the sprinkler in to put out a fire. I think they're interesting&look cool beside the wood cut outs. was taken by beliza .