The Harmsco aligning rod is designed for compatible BF1200 filter applications where internal component alignment needs support. An aligning rod is useful because it helps keep related filter parts positioned correctly, supporting cleaner assembly and more dependable filter operation.This replacement is especially useful when the original rod is bent, damaged, worn, or missing. Replacing the aligning rod can help restore proper internal support without replacing the larger filter assembly.The 679-4 is a practical service part when a compatible Harmsco BF1200 filter needs an aligning rod to restore dependable internal alignment. Harmsco aligning rod Fits compatible BF1200 filter applications Helps restore internal component alignment Useful when the original rod is damaged or missing Supports cleaner and more dependable filter assembly