1.Perfect combination of high quality 3003 alloy base material and advanced natrual color development 2.Humane design, attractive appearance,smooth and delicate surface and easy to clean. 3.Zhenqing 6 insurance technique and multi-stage pressure continuerol system will provide the system with multiole and more safety. Detailed instruction: 1) Material: aluminum 2) High intensity 3) Corrosion resistance 4) Steady and durable 5) Heat spreads evenly and rapidly without spot burning 6) The soft-anodized surface is harder than polished one, abrasion resistant, with an elegant light color, easy for cleaning owing to the plastic cup 7) Sizes: 18cm, 20cm, 22cm, 24cm, 26cm, 28cm, 30cm 8) Capacity: 3L, 4L, 5L, 7L, 9L, 11L, 12L 9) Complying with the GB13623-2003 standard