功能

• Add 37 mm to the duct dimension for the overall frame dimension.　Example:The 125 x 125 duct is a 162 mm x 162 mm frame egg crate grill for air extraction where up to 90% free space is required.　32 mm flanged aluminum egg crate core drilled for screw fastening 12 x 12 mm picture frame finish fully welded and polished to conceal corners Extruded aluminum frame silver stove enamel or white finish