5 Inch Wall Vent Cap - Galvanized Steel - Damper Only - Heavy Duty Hooded Metal Caps for Exterior Side Wall Exhaust - Spring Loaded Backdraft Damper by Vent Works

No fastener holes. Beware not 5", but 5 1/8". Weak damper spring.

exactly as described. it's thicker than i expected. the baffel works smoothly and there is a screen that encapsels the opening.

I was impressed with the quality of this wall vent. I wanted a vent that would be durable and this is the one.