Surface anti-rust treatment; Outer dimensions: 11.8 inches (300 mm); Bottom diameter: 9.4 inches (240 mm); Inner diameter: 1.2 inches (30 mm); Body weight: 2.2 lbs (1.0 kg); Plate thickness: 0.04 inches (1.2 mm); Outer size: 1.6 inches (400 mm); Exterior size: 3.2 oz (920 g).