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: 75,7 mm, section: 3,8 mm x 57,2 mm. Including 6 reducer rings: 9,5 mm (3/8), 11,1 mm (7/16), 12,7 mm (1/2), 14,3 mm (9