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4 inch White Mini Louver Fresh Air Intake w/Snap-on-ring (no tail)

This little vent cap is just a plastic exterior face plate.
Face plate:

• White plastic;
• 5 1/2" x 5 1/2" x 5/8" deep;
• (4) tapered screw holes in the four corners on 5" centers;
• (10) louvers with (13) 0.25" x 0.30 openings;
• Total free area is 9.75 square inches.

This cap can be used as either an intake or an exhaust.  If the exhaust fan attached to this cap has a backdraft
damper, a fixed louver is a good way to go.  This cap is very small and
solidly made.