**Feature** Nib Size : 0.5-0.6mm， Cap : Push Type Length 136 mm ， Diaeter 13mm ， Pen Weight 45g Take Cartridge : International standard ( Fit the Jinhao cartridges in our store ) Package : One pen and one lanxivi pen pouch as picture shown PS: The sea shells engraved on the pen are nature ，each of them is unique . The one you received may be a little varied from the picture shown Instruction for fixing pens do not flow properly 1)There is small slot in the middle of the nib ，the slot may not open enough for new pens ，you can scratch the slot with a little knife or metal to solve this . 2) You can also swing pen until the ink out when you use the pen at first time .