Von Duprin 880KR Knob Trim for 88 Series Rim Exit DeviceThe Von Duprin Knob Trim for 88 Series Rim Exit Device is a commercial exit device exterior trim with function: Knob Trim, exit device type: Rim Device, material: Metal, BHMA grade: Grade 1. Shared product specifications apply across available finish or configuration variants where applicable. Knob Trim for 88 Series Rim Exit Device Brand: Von Duprin Product Type: Exit Device Exterior Trim Function: Knob Trim Configuration: Exterior Trim Exit Device