Clemson Tigers Pen/Business Card Holder Carbon Fiber Gift Set. This new Tigers Executive 2-PC Gift set is the ideal gift for any polished or new Clemson graduate. The Clemson University Rollerball Carbon Fiber Pen is designed for optimal writing comfort. Each lavish pen is further refined by the ornate Black Carbon Fiber that adorns its barrel. Pens use Black Ink Parker refills. With the addition of our Carbon Fiber cardholder - it's truly a match made in heaven! Go Tigers!! Officially licensed Clemson Tigers fan gear.