It has a Viton seal type and a collapse pressure of 305.
Hydraulic Filter, replaces NATIONAL-FILTERS 850810, Return Line, 10 micron It is designed for an operating temperature range of -13 to 250 degrees Fahrenheit.. MILLENNIUM FILTER brand Hydraulic Filter, replaces NATIONAL-FILTERS 850810, is a Return Line filter with 10 micron filter media made of pleated microglass.