A unique magnetic cap easily and securely posts onto the nib and back of these pens without the use of threads. With 50 to 60 million proud Americans of Celtic descent, this pen will be an eagerly awaited gift honoring their heritage, pride, courage and values. The pen features intricate Celtic Knot scrollwork on the tip, clip and end as well as an emerald color cabochon on the end. The Celtic Knot motif dates back to 5th century and represents the truth of eternity and interconnected spirit. The symbolism of Celtic culture is universal. Looks great in any green acrylic as well! Rollerball refills available at most office supply stores.