365AA Heavy-Duty Surface Mounted Automatic Door Bottom Length:48" MA581B-QN-622

MA581B-QN-622

Doormerica DC40

UL listed 3 hours on hollow metal doors double egress

it can be operated from the building exterior by a standard rim cylinder

Heavy-Duty Grade-1

365AA Heavy-Duty Surface Mounted Automatic Door Bottom Length:48" MA581B-QN-622The patented automatic door bottom technology from Zero ensures an efficient seal against the floor or saddle. As the door is closed, the adjustable plunger is compressed against the door frame, activating a concealed flat spring mechanism. Zero door bottoms are designed to block penetration by air, sound, smoke, and flames. AA = Anodized aluminum Neoprene and Zero Quiet Seal Fire rated UL10C Sound rated for acoustic door systems Air infiltration