BTF-1850 Series (SD-131)
            2" X 4 1/2" Mullion
                        BTF-1850 Series (SD-131)
- This system is designed to be assembled with #12 screws.
 - Thermally Broken : Yes
 - Comparable Competitive System : 451T Series
 
                    Minimum order 1000lbs each per cut length - minimum length 8 feet, maximum 36 feet
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