Sold as each. Use with polybutylene, CPVC and copper tubing. For hot and cold water. Resists freeze damage. Rated 100 PSI to 180 F (200 PSI to 73 F). 3/4" CTS (7/8" OD) x 3/4" CTS (7/8" OD). Manufacturer"s number: QBC44N. Country of origin: United States. Distributed by Zurn/Qest.