Four extra squares, which can be used together with 37-337, ”Stackable level block”. Also excellent for use as support leg blocks, either stacked or by themselves. Use as stacked level blocks, the max load is 2.5 tons per block, and if used as free-standing sections 1 ton each. Max height per levelling block is 12.5 cm (5 levels), and as free-standing blocks max 7.5 cm (3 blocks stacked). Dimensions: 21 x 21 x 2.5 cm. Weight 0.3 kg each.