Adapter, Connection Size 1: 3/8 in, Connection Type 1: Female Inverted Flared, Connection Size 2: 1/4 in, Connection Type 2: Male NPTF, Brass, 5/8-18 x 1/4-18 Thread, 3/4 in Hex, For Use With: Copper, Brass, Aluminum, Steel Hydraulic Tubing, 1.02 in L, 1000 psi, -65 to 250 deg F, Additional Information: 0.032 in Tube Wall, 0.060 lb Weight