Thermafoil® Ribbon-Pack is a universal packing that can be found in the chemical, refinery, utility and paper applications.  Each naturally lubricious flexible graphite ring is resistant to high temperatures and pressure and is made entirely in the stuffing box.  Made of corrugated flexible graphite, Ribbon-Pack offers leak-free operation, easy installation, low maintenance, reduced stem shaft wear, never needs replacement and has a high resistance to nuclear radiation.