MEECO'S RED DEVIL offers a complete line of brushes for the do-it-yourselfer to properly clean and maintain a chimney and flue. Chimneys should be checked and cleaned on a regular basis to prevent fires and buildup. This 11 in. x 7 in. rectangular wire chimney brush with 1/4 in. NPSM thread is ideal for cleaning single-wall vent pipe and masonry flues.