... , different material, such as expanded graphite. carbon fiber. "Kevlar" aramid. PTFE. fiberglass, ramie, cotton etc. suitable for various valve, pump etc.Acid-proof ... as you work with all levels of our professional staff.For quotation, please send sketches, prints or samples, or contact us ... :0086-411-82778268Fax:0086-411-82778368Attn:Mr. Alex/ Ms. Sophia carbon fiber graphited packing