Tube and Pipe Brush Bristle Material Polyester Brush Diameter 4 in Brush Length 6 in Handle Length Not Applicable Bristle Color Yellow Chemical Resistant Yes Acid Resistant Yes Application Pipes and Tubes Bristle Firmness Medium Bristle Length 4 in Brush Width 3 7/8 in Color Coding System Yes FDA Compliant Yes Handle Color Yellow Overall Length 6 1/2 in Temperature Resistant Yes