Unique profile provides extra cushioning between the boat and trailer bunks. Washout channels flush sand and debris off the slides and away from the hull. Allow for loading and unloading the boat or watercraft in shallower water. Fast and simple installation for both horizontal and vertical bunks. Made from a low-friction composite which is impervious to sun, weather and salt water. Excellent for use on work stations, lifts, boat and watercraft dollies. Measure 1.5" x 15".