Air Filter / Echo 13031051830Pack Size:1Echo 13031051830J. Thomas EC-456, Laser 93311, Landscaper Express 30121, Landscaper Pro 3021, Mow More EC102561, NHC 207-7181, Oregon 30-121, Oregon 30-831, Ratio Parts 170-386Echo HCA200 hedge trimmers, ES200 shred 'n vacs; PAS200 pro attachments; PB200 blowers; PE200, PE300, PE2000 and PE3000 edgers; PPT200 and SRS2400 pruners; and SRM200 and SRM2000 trimmersLength: 3 1/16 ", Height: 5/16 ", Width: 3 7/64 "