The system of ordering    BONUM  could not be simpler:

Were one of the products:

- Shelf divider - Staircase with Back and Pusher - Profiles

is available in different length, its odernumber is shown with three or four dashes at the end. When ordering such a product, the desired length should be added to the order number in place of the dashes. 

For example the shelf divider 4500.120.2.T _ _ _. 4500 is the product group, 120 the height, 2 = two securing points, T= the T-shaped form of execution of the end of the article and the dashes are reserved for the lenght. 

If you require this article in a length of 360 mm, you should order it as follows: 4500.120.2.T.360