Teach measurement with this smaller version of the pan balance. 1/2 liter buckets detach for easy clean up. Sliding compensator for zero adjustments provides accurate measurements. For ages 5 and up. A smaller version of the pan balance lets students measure and compare amounts and weights. See-through pans are great for measuring liquids. A durable plastic scale with detachable pans can hold solids or up to .5liter (500 ml) of liquid.