This is an authentic TAG Heuer Aquaracer Professional 300 titanium watch link that is 18mm wide and was removed from a new BF0631 bracelet.

 It comes with the original pin and tube and it will fit the following watch models- 

-TAG Heuer Aquaracer Professional 300 Date, Automatic, 43 mm, Titanium, WBP208B.BF0631 

-Aquaracer Professional 300, 43mm Mens Watch Black dial WBP208D.BF0631

Please make sure your watch is a TAG Heuer 300 before you order this as the links for the 200 look the same but will not fit.

I have given you photos of your watch link from every angle. Please use them to add to this description.

 If you are not sure if this will fit your watch or if you have any other questions then message me. I'm here to help you.