C&D Valve # CD5421 - Tee with 1/4" M. Flare Access, Sold Each Made in the USA Tee with 1/4" m. flare access on 5/16" OD x 2" copper tube, will connect 1/4" tube, 5/16" swaged tube or 3/8" tube, CD2250 brass wrench cap and valve core Sold Each