Sold as each. For hot and cold water. For use with polybutylene, CPVC and copper tubing. Resists freeze damage. Rated 100 PSI to 180 F (200 PSI to 73 F). 3/8" x 3/8" x 3/8" CTS. 1/2" x 1/2" x 1/2" OD. Manufacturer"s number: QBT222N. Country of origin: United States. Distributed by Zurn/Qest.