Durst A1365 Durst A1365 1/8" x 24" Graphite Valve Stem Packing String, composed of a string coated with graphite. This Graphite is ideally suited for services in hot and cold water, alcohol, very mild acids and alkalis, and steam. Typical services include rotary and centrifugal pumps, reciprocating pumps, gasketing applications, or other non-critical static sealing services.