THIS IS A 1 AUTHENTIC VINTAGE SCHWINN ITEM IN NOS IN NEVER USED CONDITION,,,RIGHT OUT OF THE SCHWINN CASE / BOX OF 25...,THIS ITEM IS A FIXED FREEWHEEL COG FOR FRONT FREEWHEELING SYSTEMS ONLY,,,,THEY ARE SO NEW THEY STILL HAVE THE OIL ON THEM FOR SAFETY FROM RUST,,,,,,,THIS ITEN IS STAMPED SHIMANO FF SYSTEM,,,,THE LARGEST GEAR HAS 14 TEETH AND NEXT IS 17,,20,,24,,28,,,,,,THIS ITEM IS 4 1/2 INCHES WIDE,,,A VERY RARE SIZE NOT AS COMMON,,,,,,,DO YOU WONT THE BEST,,,HERE YOU GO,,,,NEVER USED ITEM RARE TO COME BY AND READY TO GO.