Amazon.com: Rutland Products 16510 10-Inch Square Chimney Cleaning Brush, 1/4" NPT Threading, For Clay Flues : Health & Household
Amazon.com: Stanbroil 6 Inch Round Chimney Cleaning Brush with 1/4" NPT Fitting for Insulated Chimneys, Stainless Steel or Metal Stove Pipes- Works with Most Chimney Rod Sets : Everything Else