High Lift mower blade replaces Toro OEM#'s 574700, 57-4700, 57-4700-03, 57470003, 574-4700-09, 57470009 for 38" cut. Specs: 19-3/8" x 2-1/2" x 0.187" thickness, 5/8" center Hole. Fits Toro models 612, 616 and 620 ZT unit. Also fits Toro 200 series side discharge. Stens# 375-447, 345447. Be sure to match the part number from the owners manual for the part you are replacing with the OEM number(s) listed.