The bailey z5697 lockfast brush at 400mm 16in diameter is the largest model in the range, engineered for the most demanding industrial and commercial cleaning applications. This heavy duty brush is designed for 16 inch drainage systems, large industrial chimneys and substantial commercial flues where maximum cleaning power and coverage are absolutely critical. Constructed with a reinforced plastic stock and extra tough polypropylene bristles, the 400mm brush provides exceptional cleaning performance for the largest brick chimneys serving industrial coal burning installations. Its impressive diameter delivers unmatched contact area, ensuring complete removal of heavy soot deposits, creosote and debris from large scale flues and drainage systems. The robust lockfast connection system provides unwavering security when attached to drain rods, offering the reliability that professional contractors demand for heavy duty industrial cleaning operations. Features and benefits bull 400mm 16in diameter for heavy duty industrial use bull maximum size for 16 inch drains and large industrial flues bull extra tough polypropylene bristles for demanding applications bull ideal for large brick chimneys and industrial coal burning systems bull unmatched coverage for efficient large scale cleaning bull heavy duty lockfast design for professional contractors specifications rod type plastic brush size mm 400 size in 16