Proflow screw-in breathers are perfect for gearboxes or differentials. Made from sintered bronze, these are washable and reusable. Small enough to fit in the tightest of spaces.Can used on diff housing applications but also on any type of expansion tank that requires to be vented.

PFE464-01 : 1/8 NPT

Also Available PFE464-02 : -06AN 9/16-18unf