65 cm
The long, metal, 13-hole extensions add 11 holes to the posts. This makes it possible to add extra shelves above the "normal" height.
42 cm
The medium, metal, 8-hole extensions add 7 holes to the posts. This makes it possible to add extra shelves above the "normal" height. This is not a standard article and can be produced to order.
39 cm
The short, metal, 7-hole extensions add 7 holes to the posts. This makes it possible to add extra shelves above the "normal" height.