The bunks, are the supports your boat rests on. They hold the boat straight and safe on the trailer.If the bunks get worn or damaged over time, they can cause damage to the "Gel Coat" on the hull of your boat.We have replacement carpet, and wood, and hardware for repairs. We also carry “Maxi Tuff” plastic runners with metal backers for your aluminum boat.Complete Bunks are available, however shipping bunks over 108” long will require shipping by truck. This can be cost prohibitive.