OEM‑compatible Spacer Ring (3128003116) for Simba E70, Simba M4C, Simba E7C, Simba M40S, and Simba H1354 underground drilling equipment. Made from hardened steel, this aftermarket spare part is part of the rotation head assembly, ensuring durable and reliable operation in mining and tunneling applications. Its robust construction enhances equipment performance and extends service life in demanding underground environments.