This is a replacement nib for the Cartier TRINITY DE CARTIER fountain pen. This listing is for the replacement nib only. Nib: 18K gold, EF (Extra Fine) The fountain pen was previously listed on Mercari and has already been sold. (See photo 4) The condition of the nib is unknown. Also, it is unknown whether it can be used with other fountain pens. It is being sold at a low price, so please understand that no returns or refunds are accepted. (For reference) Cartier fountain pens are OEM products of MONTBLANC. #Cartier #カルティエ #カルチェ #万年筆 #萬年筆 #MONTBLANC #モンブラン