The ROP Shop Carburetor Carb for Zama C1U-K52 C1U-K47 fits Echo GT2000 GT2100 SRM2100 Trimmer New CARBURETOR Carb Carby Fits Echo GT2000 GT2100 SRM2100 Trimmer Replaces Echo: 12520013311, 12520013312, 12520013313, 12520013314, 12520013315 Replaces Echo: 12520013316, 12520013317, 12520046831, 12520049030 Replaces Zama: C1U-K52, C1U-K47