**Feature** This converter fit all fountain pen of PLATINUM 0.53CC / once Special Attention : 'Preppy'， 'PLAISIR' and '#3776 CENTURY 'series ('NICE' and Music nib are exception) are popular. But these pen are not attached with converter. Size:1 If you want to use bottle ink， you need to use converter. This converter fit all fountain pen of PLATINUM. Special Attention : 'Preppy'， 'PLAISIR' and '#3776 CENTURY'series ('NICE' and Music nib are exception) are popular. But these pen are not attached with converter.