THIS IS A USED OEM GENUINE SET OF REDMAX DAMPERS.  THIS LISTING INCLUDES A QUANTITY OF 2 576562201 LOWER DAMPERS AND A QUANTITY OF 1 513666701 UPPER DAMPERS.  FEEL FREE TO MESSAGE ME WITH ANY QUESTIONS YOU MAY HAVE.  PLEASE BE SURE THIS PART FITS YOUR MACHINE AS I WILL NOT ACCEPT RETURNS DUE TO A BUYER ORDERING THE WRONG PARTS.  IF YOU ARE UNSURE YOU CAN MESSAGE ME WITH YOUR MODEL AND SERIAL NUMBERS AND I WILL LOOK IT UP FOR YOU IF I HAVE ACCESS TO THE PARTS DIAGRAMS TO GUARANTEE YOU RECEIVE THE CORRECT PARTS FOR YOUR MACHINE.