Corvette Billiard Shifter Knobs - Billiard 6-Speed : 1997-2004 C5 & Z06 (2.25", Black) These billiard ball shift knobs fit the factory and after market C5 shifters with out the use of adapters. Engraved, contrasting 6 speed shift pattern Made from Pertek Resin, Fade Resistant, Easy installation, NO adapters required The knobs are made in the USA from the same material billiard balls are made from.