Aftermarket blade that fits both Ferris and Scag - see OEM part number.

Length: 24-1/2"
Center Hole: 5/8"
Width: 2.5"
Thickness: 0.203"
Lift: 1"

You will need to order three blades for a 72" deck.
Will Replace:
FERRIS 48112, FERRIS 48113, FERRIS 481709, SCAG 48112, SCAG 48113, SCAG 481709, ROTARY 9883, SUNBELT B1PD2015