Traxxas Slash 4x4 Adjustable Wheelie Bar (READ DESCRIPTION). Condition is "New". Shipped with USPS First Class. This is an adjustable wheelie bar that works with a Traxxas Slash RPM rear bumper. You bolt these to the rpm rear bumper just like the low visibility wheelie bars. They are made out of high strength polycarbonate and the wheels are made out of very durable rubber. These have metal retainers inside the wheels to keep them from wearing out and keep them from over tightening. I have tested these on my truck for years and they hold up well to the brushless VXL system. This will keep the truck from popping straight up when running 3s lipo. If you're like me, I don't like my truck to stand straight up. I like for it to stay at a lower stance when riding a wheelie so I can pull it down quicker and get back to turning if needed. If you have any questions, please feel free to message me. I will include the 4M screws for the adjustments and the 3m screws for the wheels and the metal sleeves inside the wheels. Tell me which color you like i have blue, black, orange, yellow, red, and gray. Thanks for looking and have a blessed day.