ZERO 364FS Mortised Automatic Door Bottom, Heavy Duty/Intumescent,Finish-Clear Anodized

From ease of installation to hassle-free performance, the patented technology in ZERO automatic door bottoms deliver superior results. They ensure an efficient seal with an adjustable plunger that is compressed against the frame as the door is closed, activating a concealed flat spring mechanism. This mechanism drops the seal smoothly from the housing in a scissor-like motion. The seal compresses on either even or uneven surfaces and retracts automatically when the door is opened.

Heavy duty automatic door bottoms: For high use and abuse applications, primarily in institutional and commercial markets requiring the best acoustical performance.