The BF series is a series of particulate tank breathers that are designed to filter particulate matter out of the air entering fuel tanks, reservoirs, gearboxes, etc… and are offered in both metal and plastic construction with a wide range of tank connection options.

While the ELF Series is a line of filler breathers that offer not only a particulate breather for your hydraulic system but also a filter basket which will allow you to fill the tank trough the same opening.