THIS IS AN OEM GENUINE NEW OLD STOCK STIHL 1107-350-0500 FUEL CAP WITH RETAINER. EVERY SINGLE CAP HAS A CHIP ON ONE SPOT OF THE CAP WHICH MUST BE FROM THE MANUFACTURING SINCE I SEE THE SAME SPOT ON EVERY CAP. THIS WILL BE SHOWN IN THE LAST PICTURE TO SHOW WHAT I AM REFERRING TO. 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 PURCHASING THE WRONG PART. IF YOU ARE UNSURE YOU CAN MESSAGE ME WITH YOUR MODEL AND SERIAL / TYPE NUMBERS AND I WILL TRY TO LOOK IT UP FOR YOU IF I HAVE ACCESS TO THE PARTS DIAGRAMS.