This small (2 1/8" / 54mm) diameter "Red E" decal is generally placed inside the car, immediately near the fire system release cable or actuating button. Recommended by SCCA for sedans, it can save a few critical seconds by making the actuator easier to locate. Red E in a red circle on a white background.
Note: SCCA and other sanctioning bodies require a larger "Red E" Decal (Part No. 3357) on the outside of the vehicle.