WILDFLOWER Tools HBF8 Breather Cap acts as a ventilator to provide a free flow of clean air into your reservoir.
It features oil-resistant filter elements that keep out dirt and dust particles as small as 40 microns.

Measures: 2.56" x 2.56"; Inner diameter: 1/2" - See images for measurements.
Material: Carbon Steel

Thread Size: 1/2 NPT

Cap Type: Threaded
Product Common Use: Hydraulic Tanks, Hydraulic Reservoirs