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Swapped this onto my 15 Series flex neck gun after the old insulator got brittle, and it clicked right into place with no wiggle. Keeps the internals protected like it's supposed to.

Wasn't sure I needed this until my gun started acting up mid-project, but it fit my 15 series rigid neck perfectly and the insulation issue cleared right up. Cheap enough that I grabbed a spare for the toolbox.

Snapped right onto my 15 series flex neck gun and the arc has been noticeably steadier since. The plastic feels thicker than the old one that cracked, so I'm hoping this one actually lasts.