1/2" trim thread widespread 16 teeth, Left Turn Close Cold Faucet Stem Used In Altmans, American Faucet, Andre Collection, Brasstech, Newport Brass, California Faucet, Concinnity, IW, Mico, Paul Decorative, Phylrich, Santec, Sigma, and others. 2 5/8 Total Length and Measures 3/4" across the bottom.