This automatic shift knob is made from 6061 billet aluminum for the 1991 GMC Syclone, 1992 -1993 GMC Typhoon, and 1984 - 1996 C4 Chevy Corvette with automatic transmissions. It comes anodized black only. The shift knob also comes with a threaded plug that can be drilled out to install an electrical control switch for things like TCI, NOS, or other devices.