Cutting blade compatible with AL-KO lawn mowers: 42 B - 420 B - Comfort 42 B - Comfort 420 ONLY: 547 X - 547 RX TECHNICAL SPECIFICATIONS Distance between holes in mm: 65,00 Central hole: round Central hole in mm 19.70 width in mm: 50.00 length in mm: 408.00 Direction of rotation: clockwise thickness in mm: 3.00 Ø external hole in mm: 8.70 code: 122-807 original part number: AL-KO 117723 531435 531437 SL77531435 CZ ONLY