Inner wall: oxidized inner wallMaterial: ironCapacity: about 1.2L- Before first use, put 5-10 grams of tea into the cast iron teapot and brewing for about 10 minutes.- A tannin film will cover the interior, which is the reaction of tannin from tea leaves and Fe2+ from the iron teapot, and it will help remove the odor and protect the teapot from rusting.- Pour away the water after it is done boiling. Repeat the produce for 2-3 times until the water is clear.- After each use, please do not forget to empty the teapot. Take the lid off while drying, and the remaining water will be evaporated slowly.- Recommend not pour over 70% of capacity water into the teapot.- Avoid cleaning the teapot with detergent, brush or cleaning implement.Package Includes:1 x Cast iron tea kettleOnly the above package content, other products are not included.Note:1. Please allow 1-2 cm error due to manual measurement and make sure you do not mind before ordering.2. Please understand that colors may exist chromatic aberration as the different placement of pictures.If you have any questions about this product, please contact us and we will reply you within 24 hours. Buy with confidence.