Air filter for ECHO trimmer trimmers and lawn edge trimmers models: SRM 260 , 261 , 270 , 310 , 311 , 340 , 2400 , 2410 , 2450 , 2501 , 2510 , 2601 , 3000 , 3100 , 3110 , 3400 and various other models Code: 310734 Original part number: 13031051830 ECHO SR