Learning Resources Precision School Balance with Weights. Sturdy balance is the ideal maths class accessory! This durable and precise balance is made of high-impact plastic and includes a built-in weight case with lid and 5cm-deep removable pans. Balance has a total capacity of 2,000g with +/- 0.5g accuracy. Features a zero adjustment wheel and damping button. Comes with ten brass weights. Measures 30cm W x 15cm H.