This measuring balance is an excellent primary or upper elementary school balance for accurately determining the mass of solids and liquids. This durable and accurate plastic balance has an easy zero adjustment, clear graduated 1 litre buckets with lids, 14 stackable weights (2 x 20g, 4 x 10g and 8 x 5g), and 11 metal weights (1 x 50g, 2 x 20g, 2 x 10g, 2 x 5g, 2 x 2g and 2 x 1g). The total of all weights combined is 246 gram. The balance measures 47 x 14.5cm high. It has built-in weight storage compartments for easy pack up after use. The set has both plastic and metal weights. Use the lids of the buckets as platforms for the weights. Ages 6+ years