What are the size and materials of the mobile phase bottle caps and O-rings?

The mobile phase bottle caps are made of polypropylene with a PTFE insert. The O-rings are made of Viton® and coated with PTFE. The caps, inserts, and O-rings are made for use with GL 45 screw thread  bottles. The ring has an outer diameter of approximately 36.4 mm and an inner diameter of approximately 28.6 mm. Mobile Phase Bottle Caps Product Page

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Wikipedia Reference for use of Pipets with Organic Solvents.

From Wikipedia  Piston-driven Air Displacement Pipettes These are the most accurate and precise pipettes. They are more commonly used in biology, though they are commonly used by chemists as well. The plastic pipette tips are designed for aqueous solutions, and are not recommended for use with organic solvents which may dissolve the plastic. Link to […]

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