The ISUZU 1121211011 Piston Ring Set is a genuine OEM component designed for Isuzu 6BG1 diesel engines with a 105mm bore. This set includes piston rings with specific thicknesses of 3.0mm, 2.5mm, and 4.0mm, ensuring optimal piston sealing and engine performance. This high-quality piston ring set is essential for engine overhaul and maintenance, contributing to the longevity and efficiency of the engine. It is commonly applied in various Hitachi excavator models, including EX200-5, EX200-6, EX220-5, EX220-6, CX210, CX240, CX290, ZX200, ZX210, ZX225, ZX230, ZX240, ZX270, ZX280, ZX330, ZX350, ZX370, ZX450, ZX470, ZX600, ZX650, ZX800, and ZX850.