Brand: AIM Sports
This round insert is designed specifically to fit into a rubber button cover on an AiM PDM keypad (Part Nos. MC-KEY08 or MC-KEY12, sold separately). The back of the insert has a flat tab which fits into the cross-shaped slot on the keypad button. Sold individually.
This "Start/Stop, Red" insert has a red background with the word "START" in all capital letters above a horizontal line and the word "STOP" in all capital letters below the line.