OEM Carburetor / Zama C1U-K52Pack Size:1Zama C1U-K52J. Thomas C1U-K52, NHC 203-5808, Oregon 50-619, Rotary 11177Echo SRM2100, GT2000, GT2100, ST2000SB, PAS and PDSR trimmers Not compatible with greater than 10% ethanol fuel