BoreSnake, BoreSnake, Bore Cleaner, For 20Ga Shotgun, Clam Pack WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. Brass weight on the pull cord is stamped with size 50% more brush cleaning power Cone-shaped bore guide on the leading end Nylon cord attached directly to the bronze scrubbing brush Lubrication zone Everything you love about the BoreSnake plus better cleaning and superior strength.