Amazon.com: Professional 11.5 Inch Ceramic Honing Rod Has 2 Grit Options, a Firm-Grip Handle, Hanging Ring, and Japanese Ceramic. Noble Home & Chef Sharpening Rods are Perfect for Chefs! (Black, 2000/3000 Grit):
Ceramic Sharpening Steel 26 cm Oval, Fine Grit Blue Handle MS-0109CO IOXIO | COOZINA
RISAM 10 INCH Ceramic Honing Steel (Recommended for Japanese Knives) | Rui knives