Abstract: A filter such as a liquid filter for use with a filter head that includes a filter base collar is provided. The collar retains the filter to the filter base and includes a plurality of protrusions and receiving gaps between adjacent protrusions. The filter has a mounting interface including an inlet port, an outlet port and a plurality of radial projections, with the mounting interface configured for fluid communication filter head and with the radial projections being arranged in an annular array configured to pass through the receiving gaps and also configured to axially engage the protrusions of the collar.

Abstract: Methods of processing filter media sheets to provide geometries therein are provided. Tooling for use in the methods are also provided. The tooling has a low static coefficient of friction relative to the filter media sheet and a sufficient wetting contact angle to prevent sticking of the filter media sheet to the tooling so as to avoid damaging the filter media sheet and to provide consistently formed geometries in the filter media sheet.