This brush is for light cleaning of harder deposits in masonry/tile lues. They can be combined to create a double-brush on either viper. Always make sure to use a brush sized 2" larger than your flue.
WARNING: Carcinogens: This product can expose you to chemicals including Lead, which is [are] known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.