These 7 mm half rings are designed for the later 4V bikes (2007 and later). They are ever so slightly smaller (.001 in) to fit the newer bikes. This redesign was necessary as Ducati made the groove on the valve stem slightly less shallow, causing the stock half rings to fit very tight, sometimes too tight.
These half rings have been electropolished remove any surface irregularities to increase strength.
Price is for 1 half ring.