This adapter is designed to to provide an inert vacuum tight seal between all GL threads to standard taper joints. This 1085-13 adapter is specifically designed to connect any 24/40 inner joint to a media bottle with a GL-45 Joint with a drip ring (1395 Corning Media Bottles)

Advantages:
Inert - Solvents only come into contact with the PTFE adapter.
Vacuum Tight - This adapter can perform with vacuum systems.
Eliminates Joint Freezing - PTFE vacuum adapters eliminate the need for joint grease, keeping solvents pure. 
High Temperature Cap - Cap is made from PBT that can reach temperatures of 200ºC