UP Air Brake Tractor Knob Screw-on Chrome Body with 4 Stickers #22991 Each

This knob is chrome aluminum and it mounts by screwing on. It has a 1 7/8" diameter top and the base has an 7/8" outside diameter. It comes with 4 glossy plastic stickers-black, blue, red and silver. The sticker is 1-3/4 inches wide and fits the top of the knob. New. Set- 4 stickers and knob.