When a standard filter breather is not enough for a humid environment, Dodge® now offers the optional Hydra-Lock line of harsh duty desiccant breathers. These are designed to deliver maximum protection from humidity and contaminants. The breathers not only filter moisture, but also filter particles down to 3 microns. The benefit to the end user is maximum protection for maximum uptime. Dodge® Torque-Arm™ Hydra-Lock Desiccant Breather, 4 in Diameter, 8-1/8 in Height, 1 in NPT Thread, 20 to 200 °F Operating