They are made for the Rolex Oyster watch bands which has 19mm lugs. 17MM 18MM 19MM 20MM 21MM 22MM 23MM 24MM 26MM. 3 SET 550 END PIECE LINK FOR FAT SPRING BAR JUBILEE BAND ROLEX GMT 16710 20MM SS. 3 SET 455B END PIECE LINK FOR JUBILEE WATCH BAND 36MM ROLEX 20MM FAT SPRING BAR.
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