Fitment: Fits for CAT 3126B w/HUEI injectors 10R-0781, Fits Caterpillar Marine Model 3126 / 3216B, CAT C7 C9. Features: 1) Other Part Number — 10R0781, EX630781, 197-7107, 198-6605, 199-6065, 222-5926,WT3126PD, 2272911, 8C0563. 2) Easy to use, just open the cylinder head to complete this job, saving you time and money. 3) The high-speed steel cone used in the disassembly tool is of the highest quality currently available, with anti-rust and anti-corrosion effects, ensuring an unparalleled long life. Package included: 1x Fuel Injector Sleeve Installer, 1x Fuel Injector Sleeve Remover, 6x Injector Cup, 12x O rings .