Mdf laser dividers for the large Trofast trays. (40cmx30cm trays)
 
These are single pieces with little stands so they stand freely and can slide along the tray to give you the space you need in each section.
Great for storing Lego, small parts and other bits.
 
They are available in packs of 2 (2 divider partitions and 4 feet) 
 
Also available is White Acrylic - The main divider is White 3mm acrylic and the stands are standard 6mm MDF - Ideal if you want to write in them and wipe off again