Set of six double-height ladder/riser combination parts. These are designed to be used instead of our standard floor risers. Each riser measures 137mm between floors, and features tab slot holes for our removable wall sections. The ladder design is the same as our standard ladder. Each rung measures 4x19mm and allows the figure base to fit into the ladder rung. These are perfect for buildings where you want permanent ladders as part of the tower.