Extang Express Tool Box Roll-up Truck Bed Tonneau Cover | 60940 | fits Chevy/GMC Silverado/Sierra (6 1/2 ft) 99-06, 07 Classic (incl HD) Easily Bridges The Toolbox To Tonneau Gap L-Channel design also provides for rain drainage Fits Most Standard 20 in. Tool Boxes Instant Truck Bed Protection With Top-Notch Looks And Performance Most Convenient And Easy To Roll Up Style