California Proposition 65: This product contains a chemical known to the State of California to cause cancer. Pipe Freezing Spray Kit, Material Application Copper, Steel, Average Freezes per Can 20, Can Size 304 mL, Time to Freeze As Little as 10 min, Minimum Steel Pipe Size 5/16 in, Maximum Steel Pipe Size 1 in, Maximum Freeze Duration 30 min, Maximum Copper Tube Size 1 in, Minimum Copper Tube Size 5/16 in, Formula CFC Free