Package content: you will receive 4 pieces of retractable balls with ropes, 4 pieces of adjustable clips and 4 pieces of hooks, practical garage parking instructions for various vehicles, enough for your useAdjustable length: each garage ball measures approx. 2.5 inches in diameter, equipped with a rope of approx. 13 meters long and adjustable buckles, suitable for different types of cars; These stop sensor balls are mainly in a bright yellow color, which is obvious and easy to see, bringing you a pleasant parking experienceEasy to install: use a hook to hang the rope on the cabin, and use a clip to adjust the rope to the desired height; After installation, ensure that there is a proper parking distance in the garage and remove the car from the garageSafe material: the parking assist balls is made of rubber and felt, soft and will not scratch the glass or stain the car, it parks nicely and helps you determine the parking distancePractical parking indicator: conveniently and quickly assist you to park easily, bid farewell to parking troubles and protect your car