Specification 

Material: ABS

Diameter : 54mm

Features:

The shift knob size is M12*1.25,

the package will have other 3 x Threaded adapters (M8 x 1.25, M10 x 1.25, M10*1.5)

Brand new never used or installed. 
Direct replacement of the original knob, no modification needed so long as thread size matches. 

Package includes: 
1 x Shift knob 
3 x Threaded adapters (M8 x 1.25, M10 x 1.25, M10*1.5)