KitchenCraft 10 Piece Cast Iron Metric Weight Set: KitchenCraft Natural Elements 10 Piece Traditional Cast Iron Metric Weight Set: The Natural Elements traditional, metric, flat cast iron weights are designed for use with traditional balance scales (NETSCABLK). The compact set contains a range of assorted weights; 1kg, 500g, 200g (x 2), 100g, 50g, 20g (x 2), 10g, 5g.