8827KNL-F-SPBLK Von Duprin 8827 Series with 880K Knob Night Latch Fire Rated Surface Vertical Rod Device in Black Finish The Von Duprin 8827KNL-F-SPBLK series of exit device for all types of 8' x 8' (2438 mm x 2438 mm) double doors. The 8827 series is a...