The Extension Tube (OEM Part No. 3128312579) is a mechanical spare component compatible with Boomer 281, and Boomer-282 underground drilling rigs. Manufactured from durable alloy steel, it is designed for the feed assembly extension mechanism position. The extension tube provides structural support and controlled extension capability within the feed system, helping maintain accurate positioning during drilling operations. Its robust construction ensures reliable performance, precise fitting, and long service life under demanding underground mining conditions. This OEM replacement extension tube helps maintain feed system stability and operational efficiency.