THIS LISTING IS FOR AN UNBRANDED BLADE ADAPTER WHICH REPLACES LAWN BOY PART NUMBER 677525. I HAVE A BULK NUMBER OF ADAPTERS AND DO NOT KNOW WHICH ONES ARE OEM AND WHICH ONES ARE AFTERMARKET. I TOOK PICTURES OF BOTH ADAPTERS SO YOU CAN SEE WHAT YOU MAY RECEIVE. 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.  IF MY PART IS LISTED BY BRAND AND PART NUMBER PLEASE DO NOT ASK ME FOR MEASUREMENTS. I WILL NOT PULL PARTS TO TAKE MEASUREMENTS. THIS IS WHY I OFFER PARTS LOOKUP SERVICE.