Tanis 06697 Cut Off Tip Bottle Cleaning Brush with Long Handle, Black Nylon Bristle, 1-1/2" Diameter x 4-1/2" Brush Length, 40-1/2" Overall Length (Pack of 12) 4-1/2" Brush part 0.014 Black nylon filament For internal cleaning in industrial, laboratory, and food service industries Brushes are made with single-stem single-spiral construction Measures 1-1/2" diameter by 40-1/2" overall length