FitBest Carburetor RB-K93 with Gaskets Primer Bulbs for ECHO SRM225 SRM-225i GT225 PAS225 Trimmer Replacement manufacturer part number: A021001690 A021001691 A021001692 Echo GT225 PAS225 SRM-225 SRM-225i SRM-225SB SRM-225U String Trimmers Replaces Zama RB-K93 Package includes: 1 x carburetor, 2 x gaskets, 2 x primer bulbs