Reflective sticker is designed to increase the visibility of open car doors at night. The warning label is adhered with the sticky "Open" side to the door face. When exposed to light, the reflection of the label will be visible for a distance of more than 650 feet. Drivers coming from behind will be able to see the open door in advance and make a safe maneuver. The reflective accessory is clearly visible even in the dim light from car headlights. The supply includes 4 reflective stickers.