BrassCraft 1/2 inch x 3/8 inch Brass Multi-Turn Straight Stop. 1/2 x 3/8 inch nominal Size, CPVC x Compression, 125 PSI, Brass Body, POM/Brass Stem and Brass Compression Sleeve Trim, Nitrile/EPDM Rubber Bib/Packing Washer, 40 to 140 degree Fahrenheit