Mulching blade compatible with lawn tractor mower mowers BOLENS: 11A-73M2684, BL 4051 SD GUTBROD: 11A-73M2684, BL 4051 SD YARD MAN: 11A-73M2684, BL 4051 SD TECHNICAL DATA Hole spacing in mm: 63,50 Centre hole: 4 points width in mm: 57,00 length in mm: 507,00 Direction of rotation: clockwise thickness in mm: 3,00 Blade version: Mulching Ø outer hole in mm: 8 code: 122-857 original code: 742-0740 CZ