The Seal Kit (OEM Part No. 3128311987) is a sealing spare component compatible with Boomer M2D, Boomer L2D, BOOMER-M2C, and M2C underground drilling rigs. Manufactured from high-quality rubber sealing material, it is designed for the hydraulic cylinder assembly sealing position. The seal kit prevents hydraulic fluid leakage, maintains system pressure, and supports reliable cylinder operation. Its durable sealing performance helps reduce maintenance requirements and extend component service life under demanding mining conditions. This OEM replacement seal kit ensures hydraulic system efficiency, stable operation, and improved reliability of underground drilling equipment.