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The PRO-SOURCE L4A-25 is a MIG liner designed for use with MIG welding guns in professional welding applications. The liner guides the welding wire from the drive roll through the gun cable to the contact tip, maintaining consistent wire feed and reducing friction during operation. At 25 feet in length, the L4A-25 is suited for full-length gun cable replacements on compatible welding systems. Installation is performed by welding technicians during routine gun maintenance or when replacing a worn or kinked liner. This liner is a direct-fit component intended to restore reliable wire feed performance in MIG welding setups.
The L4A-25 is compatible with Bernard and Tregaskiss MIG welding guns. It is used in professional welding environments including fabrication shops, manufacturing facilities, and field welding operations where consistent wire feed is critical to weld quality. The 25-foot length accommodates standard full-length MIG gun cable assemblies. This liner is packaged individually and ordered in single-unit quantities.
Designed for use with Bernard and Tregaskiss MIG welding guns as stated by the manufacturer.
Installation is performed by qualified welding technicians. Disconnect and power down the welding machine before removing or installing the liner. Remove the nozzle, contact tip, and gas diffuser before extracting the old liner from the gun cable. Feed the new liner through the cable carefully to avoid kinking, then trim to the correct length before reassembling the gun components.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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