Universal thatcher blade with springs and reducer washers - L: 406 mm, center hole: 25,4 mm, ext. holes: 9,5 mm x 38,1 mm, pitch center: 74,5 mm, section: 4,0 mm x 57 mm. Including reducer rings: 9,5 mm (3/8), 11,1 mm (7/16), 15,87 mm (5/8).