Product name: Deskpen Arai-shu（洗い朱）　[no.06009] (Neostandard/Deskpen)
Price: US$700
Total weight: 25.0g
Body weight: 24.0g
Total length: 200.0mm
Barrel length: 175.0mm
Max diameter: 15.0mm
Barrel material: Ebonite
Description: The longest pen in Nakaya, and it is the best for desk work because it gives stable gripping feel. This model uses single thread screw.
It is reccomended to use with a pen stand.

The color "Arai-shu" is a different kind and quaint brighter vermilion from "Shu (vermilion)". "Arai-shu" means a light vermilion color because the color becomes lighter after washing the dyed cloth. The color can be said close to orange red. The color range is wide, from a vermilion like reddish color to a salmon pink kind of color are called "Arai-shu".
It is one of the colors that became popular in the late Edo period with the revival of Yamato-e.