The Sleeve (OEM Part No. 3128309791) is a spare part compatible with Simba M4C, Simba E70,Simba E7C, M40S, Simba H1354, SIMBA H1254 underground drilling rigs. Manufactured from high-strength alloy steel, it is designed as a mechanical component for the sleeve assembly position in shaft protection, spacing, and mechanical support systems. The sleeve provides reliable protection, alignment, and support between connected components, helping maintain proper assembly performance and equipment stability. Its durable construction ensures long service life and dependable operation in demanding underground mining and tunneling environments.