A unique shape and crisp angles of an octagonal vent really stand out, especially when in a vivid, contrasting color. Use with a wide range of siding materials. Available Sizes: 18", 22", 27", 32"

• Keystone available for all sizes except 18"; field modifications can be made to fit a keystone
• Depth: 2"
• Venting Area: 18" - 26 sq. in.; 22" - 54 sq. in.; 27" - 81 sq. in.; 32" - 110 sq. in.
• Rough Opening: 18" - 5"x 6"; 22" - 7" x 8", 27" - 9" x 9"; 32" - 10" x 11"
• Locking positions: .75", 1", 1.25", 1.5"