What is PEEK ? (Material)

PEEK is used in Semiconductor equipments, medical devices, and extreme situations where all other general plastics fail.

PEEK is a super engineering plastic, with the following characteristics:
1) superb chemical resistance (not affected by Acids, alcohol, acetone, and other harsh chemicals)
2) high temperature resistance (max continuous use 260C) (general plastics will get distorted even at Sub 120C)
3) superb strength, wear resistance, durability (on another level, compared to general plastics)

typically a fountain pen is made from general-purpose plastics ("Resins") such as:
ABS, Acrylic / Plexiglass, PC, PP, Epoxy, etc.

PEEK will greatly outperform the general-purpose plastics.
a high quality PEEK will cost over 10~20x of acrylic.

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I only use German PEEK, and exclude Chinese materials for main components
Many precision machine processing companies avoid using Chinese PEEK material.
On the surface it looks like PEEK, but it tends to gum up when you actually machine it, making it difficult to achieve high precision & quality.
Under the same processing conditions, German PEEK products have no problems.

I heard a story of a certain owner who lost thousands of dollars worth of Chinese PEEK material, due to the above mentioned problem.
Therefore, I do not compromise with material quality, and only the highest quality is used.