Patent ID: 8147582

Claim:
An air filter cartridge comprising: (a) an air filter media configuration comprising fluted media secured to facing sheet and configured in a form having opposite inlet and outlet flow faces with flutes extending in a direction between the inlet and outlet flow faces; (b) a primary seal arrangement including a seal member configured to form a radial seal with a housing, in use; (i) the seal member having a seal surface defining a rectangular perimeter shape having: (A) a first pair of opposite, straight, sides; (B) a second pair of opposite, straight, sides; and, (C) four rounded corners; wherein each straight side of the seal member extends for a distance of at least 10 mm, without curvature; and, (c) the filter cartridge including opposite sides, each opposite side having a projection arrangement thereon spaced from the primary seal arrangement so that the projection arrangement is separate from the primary seal arrangement.