Durst A1338 1/4 Inch (Aproximately 1/4LB) Graphite Valve Stem Packing Spool, composed of a string coated with graphite, re-closable pop out spool, non asbestos. 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.