39V99 - ESAB ST-21M MIG Gun Conduit Liner, 6 ft, .035-1/16 in

Smooth Feeding for Your ST-21M MIG Gun

Is your wire stuttering or jamming during welds? The problem is often hidden inside your cable. The ESAB 39V99 Conduit Liner is the genuine replacement part you need to get your ST-21M MIG gun running like new again. Designed specifically for the 6-foot cable assemblies of the ST-21M series, this liner provides a smooth, low-friction path for your welding wire, ensuring consistent arc performance and high-quality welds.

Versatile Wire Compatibility
Whether you are running standard 0.035" solid wire for sheet metal or stepping up to 1/16" flux-cored wire for heavier structural work, this single liner handles the range. Its internal diameter is precision-sized to support wires between 0.035 inches and 1/16 inches, reducing the need to stock multiple liners for different jobs. This flexibility makes it an excellent choice for shops that frequently vary their welding parameters.

Reliable Performance
A degraded liner is the number one cause of feeding issues. Over time, copper dust, dirt, and metal shavings accumulate inside the coil, increasing drag on the wire. By replacing your old liner with this fresh ESAB 39V99 conduit, you eliminate that friction. The result is a steady wire feed speed, less strain on your drive rolls, and a significant reduction in frustrating "bird-nesting" at the feeder. Keep a spare on hand to ensure your production never stops due to a simple maintenance issue.