Wilkerson® by Dixon® Miniature Particulate Filter, series: F03, 1/4 in NPT, 24 scfm, 5 micron, 250 psig, 32 to 175°F, Zinc Bowl, 4.21 in Overall Length, Zinc. Wilkerson® by Dixon® F03-02MMB Miniature Particulate Filter Without Sight Gauge, 1/4 in NPT Port, 250 psig Pressure Range, 24 scfm