Z-Series breathers are designed for applications where space is limited or air flow requirements are lower than 5 cfm. The Z-Series is typically used on gearboxes and low fluid volume applications where mounting space is limited or where a larger breather will not fit without remote mounting. All Z-Series models feature two 2 micron filters, one on the inlet and a second on the outlet. Operating Temperature: -20°F (-29°C) to +200F (+93°C). Specifications: Base Material: 100% Silica Gel. Height: 2 in 5.1 cm. Diameter: 3.25 in 8.3 cm. Mounting Connection: 1/2″ FNPT. Silica Gel: 0.3 lbs 0.1 kg. Maximum Adsorption Capacity: 1.84 fl oz 54 mL. Maximum Air Flow: 5 cfm. Maximum Reservoir Fluid Flow: 37 gpm. Type of Medium: 100% Silica Gel