Universal thatcher blade with springs and reducer washers - L: 406 mm, center hole: 20,63 mm, ext. holes: 12,9 mm x 36,8 mm, pitch center: 74,5 mm, section: 4,3 mm x 57 mm. Including reducer rings: 9,5 mm (3/8), 11,1 mm (7/16), 15,87 mm (5/8) and cover washer.