Randy’s Bristle Pipe Cleaners are 100% unbleached and can be used for mild to heavy duty cleaning. The bristle wire style makes it easy to clean your pipes. 100% Unbleached Cotton Tapered for easy cleaning 44 pipe cleaners per bundle Bristle wire style for heavy duty cleaning Ideal usage: Randy’s Bristle Pipe Cleaners should be used for mild to heavy duty cleaning on your pipes.