I've used this for six months, so it shows signs of wear. I'd like to clean the discoloration inside with citric acid, but unfortunately, I only have an IH (induction heater), so I can't. The stains haven't been completely removed either. The whitish marks and scale-like patterns are "water scale" (limescale) left in the pot by the minerals in tap water when heated. The streaks near the rim of the pot are traces of the water level during boiling. They are harmless, so please don't worry about them. Please consider this only if you understand the condition, and refrain from purchasing if you are concerned about minor details. Please comment if you have any requests for photos, etc. ■ External Dimensions φ325 ■ Internal Dimensions φ300 Depth: 300 ■ Weight 3.8kg ■ Capacity 20.0L ■ Plate Thickness 3.2 ■ Material Aluminum