The Plunger (OEM Part No. 3128310350) is a hydraulic spare part compatible with Simba M4C, Simba H1354, SIMBA H1254,underground drilling rigs. Manufactured from high-strength alloy steel, it is designed for the hydraulic cylinder assembly plunger position. The plunger transfers hydraulic force and supports accurate linear movement within the cylinder system. Its durable construction provides excellent wear resistance, precise fitting, and reliable performance under demanding underground mining conditions. This OEM replacement plunger helps maintain hydraulic system efficiency, stability, and long service life of drilling equipment.