New quality OEM Zama C1U-K51 Carburetor. Replaces Echo part numbers: 12520008460, 12520005961, 12520005962, 12520005963, 12520005964, 12520005965, 12520005966 and 12520005967. Fits many different models. If you are not sure if this is the correct item for your unit please send us model and serial numbers and we will gladly check for you.