The 52.4mm Engine Cylinder Big Bore Rebuild Kit is a high-quality replacement part for RC model vehicles. This kit includes a cylinder with piston ring, designed to optimize engine performance. With a package dimension of 7.32 x 5.55 x 4.61 inches and a weight of 5.7 pounds, this kit is easy to install and provides a reliable solution for engine issues. The manufacturer part number is CH2185, ensuring compatibility with the specified model.Condition is new only open box.C#23