Aluminum plate (80 x 200 x 0.6mm) 13 sheets The label indicates 500g, but the remaining amount is 330g. These have been stored for a long time, but I believe they will not hinder the following chemical experiments. These are metal plates useful for chemical experiments such as the properties of metals with acids and alkalis, electrolysis, and chemical batteries. Please feel free to consult with me regarding combinations with other items for sale. Kenis Online Shop sells 45 x 150 x 0.5mm plates for 130 yen each.