10 PCS Jinhao Spare Pen Nibs for Jinhao 450 , 750 , 159 , Dragon Offspring and Double Dragon Fountain Pen Nib Size : Mediun Package : 10 x Jinhao Spare Nibs and 1 x lanxivi pen pouch The 10 jinhao spare nibs are compatible with Jinhao 450 , 750 , 159 , Dragon Offspring and Double Dragon Fountain Pen . If you are not sure if they are compatible with your pens, please send us a mesage