SMALL BARREL PEN HOLDER

For use with commercially available pens with a minimum length of 70mm and a diameter between 7.8mm & 9.6mm (A). Pens whose areas 22mm to 27mm from the tip (B 1) and 65mm to 70mm from the tip (B 2) must be smooth and cylindircal-shaped are recommended.

Not for use with crayons, pencils or fountain pens.