Naniwa Super Stone ,5000 Grit Japanese Whetstone Sharpening Stone, NO Stand, 21cm x 7cm surface, 2cm thick.
NOTE: This is a full 2cm thick stone. It has been brought to our attention that other vendors are importing the cheaper 1cm thick version and then not always specifying the thickness on their web sites. Those stones are cheaper, and being half as thick will be more prone to breaking and will not last nearly as long as these normal full-thickness stones! We do NOT and have never imported or sold those cheaper 1cm thick versions of these stones.
If you want a nice polished and fine edge (and that certainly does seem to be the trend these days, especially among Japanese knife owners), then the 5000 is a great choice to finish your knife edge. It's also quite a bit more fine than the 1000 that many people start with, so this way you can purchase just a 1000 and a 5000 and you'll be pretty much set for most regular knife care. These are excellent, very much high end stones, but are one step down from the top of the line Chosera (now rebranded "Professional Stones") which use a different bonding method for a somewhat nicer feel and faster cut, but at the expense of higher prices and more fragility. I use these Super Stone series at home and they're great.
Warranty: One-year warranty against manufacturing defects.