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what you need is 10W - 25W usually doesn’t matter if the laser will be industrial grade made for working in dusty harsh environment, so the contaminant and dust particles will not get into marking head and inside onto mirrors. Example you can get https://www.ebay.com/itm/323939974238 for under 10G now, what used to be 65G https://www.radwell.com/en-US/Buy/KE...CORP/MD-H9800W
and it will do this for you, resolution of the marking is 5um what is 10 times higher from any marker made in China and sold for the same price range or even below 20G. Thank you.