This 2.25" diameter shift ball fits on the OEM shifter and retains the OEM mount and boot lip. As many know the OEM shifter has a unique mount (no threads a slot on top and a screw to secure it). Universal knobs just don’t work here. Built using a custom billet insert and a 6spd ball you get a knob that fits the same as OEM, but is what many have been asking for. 2.25" Diameter. Embedded and colored C6 Emblem and Corvette script. Made of Black or White Acrylict. Works on stock C6 & Z06 shifter and after-market shifters that stock knobs also fit.