Japenese Grills, Grillware & Charcoal | Korin. Shop from our collections of Japenese Grills, Grillware & Charcoal & More at Korin, Inc. We offer Custom Knives Orders, Price Matching and Worldwide Shipping! Wood Burning Corten Weathering Steel Outdoor Cooking Grills . Size. 80 x 90 x 130cm or customized. Thickness. 2.0-4.0 mm. Surface treatment.