Mulching blade for ride-on mowers ELECTROLUX - HUSQVARNA for machines PR17, PR17 AWD, R418Ts, R418Ts AWD, R422Ts, R422TQS AWD, Proflex 21 AWD, P524, Rider 15V2, Rider 15V2 AWD, Rider Pro 15, Rider Pro 18, Rider 18 AWD. L: 420mm. Replaces original: 504 18 78-01, 544 10 27-01.