Cowie® Taper Joint-PTFE/PEEK High-class Vacuum Stirrer Guide, with ASTM/DIN Glass Cone Joint, for Φ8~16mm ShaftsIdeal for Middle/Low-Vacuum, Max-800rpm, Chemically Inert, -200℃+280℃ Stable, 고품질 진공 교반씰 (DH24CAT00002958)