Nitrogen Vent Pressure Relief Valve (16mm I/D ; 67mm tall) A pressure relief valve to fit nitrogen vent ports on a standard range of Oxford Instruments cryostats.
High Vacuum Grease Apiezon 'N' 25g. Apiezon N Cryogenic 4K High Vacuum Grease 5x10-9 Torr at 20°, Silicone & Halogene Free. For low vapor pressure sealing and lubrication in high vacuum applications.