DUMIK TRIPOLE Nitriding: This wok features advanced nitriding technology from Japan (not made in Japan). With a triple-long nitriding process, it boasts superior strength, exceptional abrasion resistance, and three times rust protection. Even after the rigorous 72-hour corrosion test, it remains as clean as new. Pre-Seasoned & Naturally Nonstick: Armorbear wok is made from high-quality carbon steel, ensuring durability. Pre-seasoned and ready to use right out of the box. Featuring a well designed textured surface that resembles a ski slope, this stir-fry pan minimizes food sticking. With proper seasoning, you can easily achieve a natural non-stick finish. NO COATINGS, NO PFOA and NON-TOXIC. Perfect Heat Conductivity: Made from high-quality carbon steel and utilizing advanced pressing technology, our wok features a thickened bottom with relatively thinner edges. This construction not only prevents warping but also provides quick and even heat distribution for frying, grilling, saut