These aquarium dividers are made of high quality food grade plastic, non-toxic and tasteless, environmental protection does not affect water quality. You can easily divide your tank into multiple compartments with these divider brackets. This plastic grid can be shortened and combined with a splice. Suitable for glass partitions of approximately 5-6 mm. Powerful suction cup, removable suction cup, easy to clean. Use these clip dividers to separate different fish, for breeding and to prevent your fish from fighting too. Package includes: 2 aquarium divider clips, 4 suction cups. Clip Size (Approx): 6 x 8.1 x 2cm, Inner Width (Approx): 0.5cm, Suction Cup Size (Approx): 28mm (Diameter).