Test Weights of 2kg down to and including 50g are made of high quality cast iron conforming to grade 15 of IS : 210 : 1962 as per IS 1056 – 1965. Shape is hexagonal tapered downward. While nesting, weights of denomination of 2kg down to and including 50g have one round loading hole tapering outside in the centre of the underside. The weights are finished smooth and free from pits, blow holes and other defects. Weights are protected by a corrosion resistant paint of black colour. The error in excess permissible for adjusted new weights shall not exceed its limits.