Our end ring is made of a high grade flexible graphite called”PILLARFOIL®”. The “PILLARFOIL®” is external-reinforced by Inconel® wire mesh. As is is knitted, the packing is highly flexible and has excellent mechanical strength properties. This product doesn’t generate graphite crumbs much and not become spongy body inside. Therefore, our packing has good keeping in quality and will be good partner for your maintenance.