Includes Falicon Knife Rod. Balanced for a 98mm piston assembly. Custom balance service is available. This kit is designed for use with Tall Cylinders , such as the Falicon Tall Cylinder, nMotion Tall Cylinder, or Max Power's Tall Ice Cube cylinder. Tall cylinders do not need a spacer plate and other related components, because the extra height is built in. This kit will NOT work with standard height cylinders - only tall cylinders. Care should be taken to insure it will work with your cylinder and piston.