Set up a  Smog Check banner at your center to encourage drivers to drop in. Estimating 12ft feet x 2.5 feet, this Smog Check Swooper flag comes in various tones with blue and white textual style and is produced using weaved polyester material. Smog Check Swooper flag makes great outdoor advertising for auto repair and inspection shops that offer smog checks. Advertising flags like these can deliver a message, like a banner, and flap like a flag at the same time. These flags are an effective way to advertise your smog test station.