Stair-type Lego blocks can be used to build up a staircase to access the wall of the structure being erected.
Type 160.40.40-S is the smallest stair-type block, where 160 is its length, 40 is its height, and 40 is its width (all in cm). The S represents its type. Max. dimensions of the S-type steel moulds are 240Х60Х60 cm.