Oregon 598-640, BLADE, GATORB G5B MTD 16-1/4 IN 6PK GATORB G5B Also Replaces: BOLENS: 742-0611, 7420611, 742-0611A, 7420611A, 942-0611, 9420611, 942-0611A, 9420611A MTD: 742-0611, 742-0611A, 942-0611, 942-0611A Product Code:598640