If you love the ease and elegance of single tube pens, then you'll love the Presimo ™ Rollerball and Fountain pens. The metal cap on the Presimo ™ simply presses on the pen end to post and screws on to the pen nib end to close. The lustrous chrome goes well with most wood and acrylic blanks. It's affordably priced and easy to make requiring a single 10mm tube. Ideal for the turner on a budget who's looking to create a a higher end Rollerball.