Step 1: detach the drained tube from the body of the pen
Step 2: hold the new ink tube and see 2 ends of the tube, you will see one smaller end with the ball that prevent the ink from leaking, and the other end is sealed securely. Press the smaller end in the slit where the old tube connecting to the stem of the pen. You need to make sure the tiny ball pop down.
Step 3: Shake the pen in order to make ink flow out to the tip. With brand new pen, it is suggested that you wash the pen with warm water before uses. To see more details, please visit link …