The Von Duprin 98/99 Series Rim Exit Devices are wide stile heavy-duty push pads for all types of single and double doors with mullion, UL listed for panic exit hardware. Devices are ANSI A153.3-2001 Grade 1. The 98 Series device has a smooth mechanism case, while the 99 Series has a grooved mechanism case. The 98/99 Series have all been certified to the highest industry standards and are used in schools, hospitals and government buildings. A fluid damper decelerates the pushpad on its return stroke and eliminates most noise associated with exit device operations on all 98/99 Series devices. The rim device is non-handed. Covers stock hollow metal doors with 86 or 161 cutouts on single doors.