Westbrass D105K12X-12 5/8″ x 3/8″ OD x 12″ Corrugated Riser Supply Line Kit
OD (1/2 in. nominal compression) inlet x 3/8 in. OD compression outlet. Easier to bend, and is more forgiving than annealed copper tubing. Trimmable end allows cutting to length for easier installation.