The Large Slotted Mass Set consists of nine iron disks of 0.5 kg each. The hanger is 0.5 kg. Each piece cast and machined to 1 gram accuracy. The 2 kg Mass Set is similar in mass and hanger weight to the Large Slotted Mass Set, but this more compact set includes a shorter 1/2 kg hanger and three 1/2 kg slotted masses. The size and weight of these sets make both ideal for creating loads on PASCO Structures Systems.