Genie 37336R Universal Perfect Stop Garage Parking Aid

• Universal--works for all garages;• Ideal for judging stopping distance in garage to allow clearance for garage door behind the vehicle;• Sensor ball lowers into place when the garage door opens & retracts out of the way when door closes;• System mounts from ceiling & through top of door ;• Foam parking aid is gentle on windshield & will not scratch or dent vehicle;• Easy & quick installation;• Includes string & screws;