This is a complete carburetor rebuilding kit for 2bbl Holley marine carburetors. According to HOLLEY MARINE catalog this kit will fit carburetors List numbers 80313, 80313-1, 80316, 80316-1, 80321, 80321-1, 80385 . This may fit a lot more carburetors than Holley lists. Many parts are definitely interchangeable with many other Holley carburetors numbers that are not even marine. This kit comes just as you see it. There are no pictures or instruction sheets with this kit. You should have prior knowledge of rebuilding carburetors or have someone that can do this for you.