HIPA RB-26 Repair Kits Primer Bulb for ZAMA C1U-K20A C1U-K20B C1U-K21B C1U-K23A ECHO Trimmer Parts Replacement manufacturer part number: RB-26 Compatible with ZAMA C1U-K20A C1U-K20B C1U-K21B C1U-K23A C1U-K31A C1U-K34A C1U-SK11 C1U-SK12 C1U-SK13 C1U-SK13A C1U-SK14 Primer bulb included