Custom hand made burled walnut shift knob. Replace yours if worn or broken. Probably more appropriate for auto trans but could be used for stickshift.   Stepped nylon insert has 7/16" fine thread (20tpi) or 3/8" fine thread (20tpi) allowing install on 2 different size shifter arms. Metric applications would require modification. 3.5" tall x 1.875" wide. New and unused.

Ebay now collects sales tax on states and other jurisdictions where on-line sales are taxable.