Shapton Glass Stone Field Holder, #50300.
A light and affordable holder, made specifically for the GlassStone series. It's designed to store up to 3 Shapton Glass Stones, and when turned over it can also be used as a sharpening base. Note that this will only work with Shapton Glass Stones and not other stones.
Dimensions:253 x 80 x 53mm
Weight:approx. 640g