I purchased this here, but before I could use it, the animals became friends. Just the divider! Hamster Divider, 1 piece Width: Approximately 7cm Height: Approximately 27cm Depth: Compatible with Glass Harmony 600 Plus For dwarf hamsters only Made of natural wood, safe for chewing Place it in the area you want to divide, then cover it with bedding to secure it. It moves, so it can be placed anywhere, not just the middle. Considering shipping costs, this is the lowest price I can offer.