ENGINE COMPATIBLE AIR FILTER MODELS: ECHO PB-251 ECHO PB-255 ECHO PB-265 ECHO PE-280 ECHO SRM-280 height in mm 9.00 Flat air filter design Inner diameter in mm 11.00 width in mm 77.50 length in mm 77.50 PART NUMBER: 176-826 ORIGINAL CODE: ECHO A226-000473 CZ