Rotary 6122 Mulching Blade Length 21"; Width 2-3/4"; Center Hole Diameter 0.904"; Thickness 0.134"; Diameter of Outside Holes 13/32"; Center to Center (Outside Holes) 3-11/16"; Cut Direction Right Replaces: John Deere M112738, M112972, M125413 Fits: John Deere GX14SB, GX14SBE, JA60, JA60, JA62, JA62, JA65, JE75, JX75, JX85, Silver 12SB, 12PB, 12PB, 12PC, 12SB, 14PB, 14PB, 14PS, 14PT, 14PZ, 14SB, 14SB, 14SC, 14SE, 14SE, 14SS, 14ST, 14SZ, 21"