This Air Filter Is For The Following Models: AQ148 Engines ( As Fitted to Atco Balmoral, Qualcast 35s, 43s, Suffolk Punch 14s, 17s Cylinder Mowers ), AV520 Two Stroke Engines, AV600 Two Stroke Engines, AV601 Two Stroke Engines, AV750 Two Stroke Engines, MV100S 2 Stroke Engines ( Some Flymo Hover Mowers ) and is fitted as the lower filter, ECV100 Engines, H22 Engines, H30 Engines, H35 Engines, HB30 Engines, HB35 Engines, HBL30 Engines, HBL35 Engines, HBL40 Engines, HBP40 Engines, HS40 Engines, Aspera LAV30 Engines, Aspera LAVR30 Engines, Aspera LAV35 Engines, Aspera LAVR35 Engines ( As Fitted to some older flymo type hover mowers ), Aspera LAV40 Engines, Aspera LAVR40 Engines,