"Rolling docks are the easiest way to install a dock, and the Patriot Docks Straight Roll-In Dock with Poly Decking makes moving your rolling dock ultra-simple. They've become the industry standard, and this dock system from Patriot Docks can be easily moved in and out of the water with the changing seasons or water levels. Basic dock packages include 1 pair of wheels on the lake-end of the dock. Additional wheels can be added throughout the boat dock to alleviate lifting or to help distribute the weight of longer docks. The modular dock frames utilize custom aluminum profiles and professional engineering to create a strong yet lightweight dock design that's simple and easy to assemble. The 8'L x 4'W frames bolt together which allows for exceptional versatility and customization. Full 12"" high truss work allows for more land on the support pipe creating rigid structure. Decking panels are made of strong polypropylene reinforced with aluminum. Additional sections can be added to create any style or configuration, including ""T"" and ""U"" shapes as well as fingers and slips. Don't break your back any longer roll in a dock! The aluminum frame comes with a mfrs. limited lifetime warranty. Package includes: two 8'L x 4'W frames, one end rail, two post brackets, two 4' posts, one 6' post, one axle converter pair, two plastic dock wheels, one wheel stop clamp pair, two vinyl caps, and four 4'L x 4'W panels. This rolling dock can be easily moved in and out of the water Modular dock frame is both strong and lightweight Polypropylene deck panels reinforced with aluminum High-density polypropylene wheels Simple and easy to assemble"