Listing is for one good used PNEUMATIC PILOT TOOTH CLUTCH SYNC PULLEY #(3522B-82) 3-1/2" INSIDE BORE DIAMETER. AND A 10-1/2" OUTSIDE DIAMETER. 1-7/8" WIDE, 60TOOTH. FITS NEXEN PNEUMATIC TOOTH CLUTCH MODELS #(5H45P)IT ALSO MAY FIT OTHER, THESE PULLEYS ARE USED, AND MAY HAVE A FEW SCRATCHES AND NICKS, BUT NOTHING THAT WILL AFFECT THERE FUNCTION. IF ANYONE HAS ANY QUESTIONS REGARDING THIS ITEM, PLEASE FEEL FREE TO MESSAGE US. WE WILL BE HAPPY TO ANSWER THEM. THANKS FOR LOOKING.