The 665XA2N1000H from Sioux Chief is a 100ft roll of 3/4” PowerPEX Oxygen Barrier PEX-a Tubing, Natural. Intended for use in closed or open loop radiant floor heating and hydronic heating systems. Suitable for potable water use. Direct replacement for Uponor/Wirsbo hePEX A1140750 and Mr. PEX 1240010. For use with F1960 style expansion fittings, expander tool and expansion sleeves. Fully compatible with Uponor ProPEX connection system.