1)brass body, brass o-ring and brass nut 2)HPb58-3 or HPb59-1 .............. Descriptionlong male elbowBrass compression fittings are composed of brass body, brass o-ring and brass nut.The material is usually used of brass type HPb58-3 or HPb59-1, but customers’ requirements are also allowed. The process of production is forging, shot blasting, fine finishing, assemblying, testing and packing. ...