Easy to install-just insert the male header into the female header, place one male header on top of the other and push down. Can't push horizontally. If you cannot connect these grids together, it is recommended to use a zipper tie Multi-functional split-the fish tank compartment can be used to separate fish that are starting to become too aggressive. Raise rocks in Aquascape as the bottom of the aquarium, make turtle slopes for your turtle habitat, or do other DIY projects. Unlimited use of these itemsUsed as a plate for bottom filtering, favorable water cycle. To separate the fish tank fish, or as a fish tank base. Easy to disassemble, not easy to fall off. Suitable for all kinds of aquariums. Note: Since the size above is measured by hand, the size of the actual item could be slightly different from the size above. Due to the lighting effects, monitor settings, etc. There could be some slight difference in the color tone of the pictures and the actual item. Due to different production batches, there may be slight differences in products. color:translucent Material:plastic Size (WxL): Approx.30x15cm/11.81x5.91inch Package Contents: 10 Piece Fish Tank Isolation Plate Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.