SUEHIRO Premium Ceramic Dual Whetstone 3000/1000 Grit - Professional Knife Sharpener for Kitchen Knives, Chefs & Home Cooks - Perfect for Honing, Polishing & Maintaining Razor-Sharp Edges

Manufacturer: Suehiro
Type: Combination 

Stone Size:  183×63×27mm (7.2×2.4×1'') 
Medium: #1000 (blue)
Finish: #3000 (yellow)
Material: Ceramic
This items do not have a stand.
But putting the stone on a wet towel prevents to slip. 

Made in Japan
Home use size, but same whetstone quality for business use

How to sharpen

1. Please soak in water enough before sharpening.
2. just sharpen with the water which appears when you sharpen without washing it away.
3. How to sharpen
(Double bevel)
Sharpen one side 10-15 times, then the other side 10-15 times. with the same angle, with the same power. The angle is 15 degrees.
(Single bevel)
At first sharpen front side 10-15 times.
Next sharpen back side while pulling knife a few times for removing the burr.