RC enthusiasts, give your Traxxas Slash 4WD a performance boost with these FastEddy bearing sets. Worn-out stock bushings or bearings can cause friction and rob your truck of speed and runtime. This pack contains TEN (10) high-quality steel/chrome bearings sized 10mm inner diameter x 15mm outer diameter x 4mm thick (10x15x4). They come with two rubber seals on each side to keep dirt and grime out and grease in, making them more durable and weather-resistant than open bearings. FastEddy is a trusted name in the hobby for providing reliable, smooth-rolling bearings that fit perfectly. Swapping to these can reduce drivetrain drag, improve efficiency, and help your Slash run cooler and faster. They're also useful for countless other hobby applications like robotics, bicycles, etc. An essential upgrade for any serious Slash owner looking to maintain or improve their truck's performance. Install them in the wheels, gearbox, or other rotating points as per your truck's manual.