Simply cut the sheet with a pair of scissors to length, remove the 3m backing and carefully place onto a painted tube and then cast it in your favorite casting material.

The pen on the left is a ProX Art Deco pen and the pen on the right is a Majestic Squire made with the 3/8" sheet. This is just showing the pens as an example of what they would look like.

NOTE: No two shell pieces will ever be the same - the way Mother Nature intended!