These insulators are compatible with specific models of Tweco MIG guns. They help prevent the electrical arc from consuming the guns' nozzle during MIG welding, which extends the nozzle's life.

These insulators are compatible with specific models of Lincoln MIG guns. They install over the rear part of the guns' diffuser to help ensure no electrically live surfaces on the diffuser are exposed and to prevent unwanted contact with those surfaces.

These insulators are compatible with specific models of Bernard, Miller, and Hobart MIG guns. They install over the rear part of the guns' diffuser to help ensure no electrically live surfaces on the diffuser are exposed and to prevent unwanted contact with those surfaces.