The product is a lot of 3 new AGS Company CF-3B brass compression union tubes in size 5/16. These fittings are used for automotive applications and come with a California Prop 65 warning regarding cancer and reproductive harm. They are interchangeable with various part numbers such as 62X5, 162500, 2957, 490-024, and 785-306. The manufacturer part number CF-3B is referenced, and the fittings are sold in a unit quantity of 3.