California Proposition 65: This product contains a chemical known to the State of California to cause cancer. California Proposition 65: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm.Valve Stem Kit, For Use With Grainger Item Number 6Z563, For Use With Mfr. Model Number 311A, Fits Brand Ingersoll Rand, Includes (2) O-Rings, (1) Spring and (1) Screw