Chevrolet caps.  This sale is for a set of six (6) NOS Dill 627 tire valve stem caps.  This is the exact cap that all GM products were equipped with from the factory 1963-2004.   They are 100% correct for judging by VCCA (Vintage Chevy Club of America), AACA (Antique Auto club of America), and MCACN (Muscle Car and Corvette Nationals).   On the cap in raised letters is the word "Dill" and the number "627" (see pictures) The raised tip has a recess for pressing the valve core to release air.  18 raised ribs surround the cap for grip.   This is just another item to make your fine Chevy look like it just rolled out of the factory.  Your satisfaction is always 100% guaranteed or your money quickly and cheerfully refunded.   I also have NOS 1953-62 valve caps if you need them.   The pictured yellow car is a 1969 Chevelle at the 2016 MCACN show in Chicago.