This Everflow Boiler Air Valve is the Ideal Choice for Air Removal in Your Hydronic Heating Applications. It Features a Solid Brass Body, Universal Fit, Advanced Design, Quiet Operation, and Extended Service Life. Manufactured With the Highest Quality Materials and Workmanship, it Will Serve Your Plumbing Needs Faithfully. WARNING: Handling of this product will expose you to lead, a chemical known to the State of California to cause [cancer, and] birth defects or other reproductive harm. Wash hands after handling.