2 Warning Information Included --- DO NOT ENTER and CLEARANCE 7' 3", compatible with all garage door openers, each with a length of 80" inches, included in the installation kit.
24/7 High Visibility --- The bright yellow appearance and large area of 3M super strong grade yellow reflective film make the product very eye-catching even at night.
Quick and Easy Installation --- Iron chains are very easy to buckle, and you can decide the height of installation on your own. The iron chain has an anti rust protective layer, which is not easily corroded.
Garage Parking Guide --- The Perfect Stop sensor ball lowers into place when the garage door opens and retracts out of the way when the door closes.
Flexible Applications --- Height limiting and no entry crossbars, for parking lot, warehouse, garage, or other large buildings entrance and exit.
