HIPA RB-27 Carburetor for ZAMA C1U-K22A C1U-K23B C1U-K31B C1U-K35A C1U-K45 ECHO Trimmer Parts Replacement manufacturer part number: RB-27 For ZAMA C1U-K10A C1U-K12 C1U-K21A C1U-K22 C1U-K22A C1U-K23B C1U-K31B C1U-K35A C1U-K45 Refer to ZAMA rebuild kit number and specified ZAMA carburetor model number to buy the kit