RUBBERMAID STOCK TANK FLOAT VALVE ALL-PLASTIC ANTI-SIPHON FLOAT VALVE PROVIDES CONSTANT WATER LEVEL. ALL PLASTIC CONSTRUCTION WITH AN ANTI-SIPHON DESIGN. FITS RUBBERMAID STOCK TANKS. BUILT TOUGH FOR SUPERIOR PERFORMANCE AND LONG-LASTING DURABILITY IN ALL KINDS OF WEATHER EXTREMES. 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 - 1,3-Butadiene