Give your stock fiberglass truck lid or tonneau cover a clean, custom, high performance look by adding a set of Gaylord's SpeedBumps®. Gaylord's SpeedBumps® can be installed by the do-it-yourself or through Retail / Installation outlets. Gaylord's SpeedBumps® come in two sizes and are available in ready to paint primer finish or optional automotive paint. Gaylord's SpeedBumps® work with most fiberglass truck lids.