Sold as 3 UNITS at $12.61 per unit. (1 unit = each.) 15" Long POL x 1/4" Male Inverted Flare. Used to connect cylinder valve to change-over regulators or check tee fittings. Bagged. Manufacturer Part Number: RV-339B. SKU : 8105975. Country of Origin: (TBA). Distributed by US Hardware.