Shapton Glass Stone Field Holder, #50300.
A lighter and more affordable holder, made specifically for the GlassStone series. Note that it is NOT adjustable and so will ONLY work with the Shapton GLASS Stones! It's designed to store 3 GlassStones, and when turned over it can also be used as a sharpening base.
Dimensions:253 x 80 x 53mm
Be sure to check out the Shapton FAQ.
Made in Japan.