or
SGE GC Ferrule Graphite/Vespel Front & Back ferrule (GVF 15%Graphite/85%Vespel) 1/4inchID For Agilent (HP) PE TQ Varian SGE GC Ferrule/MS Use w/ 1/4inch Swagelok SGE long style (SSNE) nuts For 1/4inchID packed column Temp <350 Non-reuseable.1