Echo CS-2511TES NGK Spark Plug. Also fits the following Echo models; HCA-2620ES-HD, HCAS-2620ES-HD, PAS-2620ES, PPT-2620ES, PPT-2620HES, SRM-2620ES/L, SRM-2620ES/U, SRM-2620TES/L, SRM-2620TES/U, SRM-3020TES/L, SRM-3020TES/U, HCA-2620ES-HD, HCAS-2620ES-HD, PAS-2620ES, PPT-2620ES, PPT-2620HES, SRM-2620ES/L, SRM-2620ES/U, SRM-2620TES/L, SRM-2620TES/U, SRM-3020TES/L, SRM-3020TES/U.
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