Whether a part fits depends on the specific case and the part — lug width, case diameter and movement family are necessary but not sufficient. Each product page carries its own compatibility list, and that list is the authority for what fits what.
Not sure where to start? Build it visually in the watch configurator. For a fitment question on a specific part and case, check that product page's compatibility list — if it's not listed there, it isn't confirmed.
![Seikonaut Bracelet 20/16mm [TITANIUM] - - - - Lucius Atelier - Swiss Quality Seiko Watch Mod Parts](http://luciusatelier.com/cdn/shop/files/Seikonaut-Bracelet-2016mm-TITANIUM-Lucius-Atelier-Swiss-Quality-Seiko-Watch-Mod-Parts-7_1600x.jpg?v=1745004195)
![Seikonaut Bracelet 20/16mm [TITANIUM] - - - - Lucius Atelier - Swiss Quality Seiko Watch Mod Parts](http://luciusatelier.com/cdn/shop/files/Seikonaut-Bracelet-2016mm-TITANIUM-Lucius-Atelier-Swiss-Quality-Seiko-Watch-Mod-Parts-7_2000x.jpg?v=1745004195)
