This model is CT20, its OEM number or part number is 17201-54030, 1720154030, 1720154030 790318-0004, its Engine Code: 2-LT, it is suitable for UNIVERSAL MARINE and other models, it is made of high-strength aluminum and Compressor housing and turbine housing made of steel. The ink cartridge is made of aviation-grade k18 high nickel material, which has good heat resistance and durability, which makes it very high in quality and quality control is the industry’s leading standard.