This is a mortise exit device with a push bar for egress doors. It installs in a mortise lock prep on the door and gives a single bar for exit. Von Duprin is an Allegion brand. Part 9975K-F 3 US28 is the 36 Device, Fire Rated, Classroom Function, Knob with Escutcheon Trim, Less Dogging, Field Reversible version in Satin Aluminum Clear Anodized.

• 36 Device
• Fire Rated
• Classroom Function
• Knob with Escutcheon Trim
• Less Dogging
• Field Reversible
• Finish US28 Satin Aluminum Clear Anodized
• Grade 1
• Fire rated: Yes {Variable}
• Part number 9975K-F 3 US28