The Waterway 110-0120 is Shurflex 3/8" x 9/16" Clear Vinyl Tubing. Waterway's Shurflex brand flex hose and tubing is made in the USA under the same strict manufacturing conditions as all of our quality pool, spa and bath products. Tested & certified listed by NSF international to requirements of both, ANSI-IAPMO-21033 and NSF-50 standards.