Water-Pressure Drain Opener Combination Kit Clears all household drains with 3/4 to 4 pipes. Environmentally safe. Uses water pressure to unclog Sinks, tubs, showers, and other drains. Size 3/4 to 4 , Pkg Qty 1, Package Type Card This product can expose you to chemicals including Isoprene which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.