Nakayama Ao Asagi Size: Length 204mm Width 77mm Thickness 20mm (Whetstone only) Weight: 930g (with base) This is a Nakayama whetstone from my collection. Even with this thickness, it's a high-quality Ao Asagi stone, hard and with fine particles, that will last a lifetime. Stable-quality Nakayama stones are becoming increasingly rare year by year, so I'd like to pass it on to someone who will cherish it. Don't miss this opportunity!! (The sides are protected, so you can use it with peace of mind.)