Shapton Hard Ceramic Glass Sharpening Stone 500 Grit 29.4 Micron 50102

500-HR grit/29.4 micron. 8.5 x 3 x 0.75 inches. Lasts longer than other waterstones. No need to soak before using - the original splash and go stone. Complete instructions included. Imported from USA (Sizes & Specifications are based on the USA Market). Shapton Glass Stones feature the highest quality ceramic abraisves on the market. Shapton Glass Stones have been designed for fast sharpening and low maintenance. Shapton stones do not need to be soaked in water, you simply splash on a little water and go.

eBay