This is a complete carburetor rebuilding kit for 4bbl Holley Spread bore marine carburetors. Kit is assembled by Allstate Carburetor. According to HOLLEY MARINE catalog this kit will fit carburetors List numbers 80310, 80310-1, 80328, 80328-1, 80328-2. 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 for marine use. This is a bulk item and comes just as you see it. There will be float leveling instructions with it. There are no pictures or instruction sheets with this item. You should have prior knowledge of rebuilding carburetors or have someone that can do this for you.