Long nut, compression, tube size 1/4 inch tube connection, material of construction Brass, outside dia .255 inch thread size 7/16-24, hex size 1/2 inch Length .75 inch pressure (psi) 75 to 400, Temp range -65 to 250 degree F, standards UL listed for Flammable liquid, meets functional requirements of SAE J512, package quantity 10.