Made for openings from 12" to 36". Up to 4 inches thick.

Manufactured from 14-18 gauge steel, 16 gauge for stainless steel and 12 gauge for aluminum.

Correctional louvers are specially reinforced.

Highly rust resistant paint always provided.

Allows 60% of ventilation area.

Inverted V-Type for interior, and Z-Type blades for exteriors.