Ink Refills found on Amazon
2.75'' Ballpoint Pen Refills, Replaced Refills for Diamond Crystal Stylus Pens and Ballpoint Pens (Black Refills,10 pack)
To refill: Hold pen on either side of the silver ring and gently pull apart. Unscrew the ink silver tube with black cap inside. Replace, then screw in gently. Replace the top barrel by pushing together gently until in place. Numerous how to refill metal beaded pens on YouTube are helpful also.