Black, 25 inch (XL model) shaft length. 12 pinion teeth, right hand rotation.. Fits:. 3.0L Mercury Optimax or Pro XS, s/n 1B504989 and above.. This is an open box item. It will therefore likely not ship in its original packaging. This will not affect the use or function of the product, and it is in otherwise new condition. All open box sales are FINALE, No Returns, No Refunds.