These support feet give support to isolation board for easy cleaning of feces of fishes.ADJUSTABLE: You can adjust the height of the supporting feet according to the partition at the bottom of the water tank to meet the needs of your aquarium.STABILITY: The more the number of feet, the higher the stability of the divider. The main reason is that the height will increase by 1.8cm/0.71in with each additional foot put on.HIGH QUALITY: Made of high quality PVC material, non-toxic, harmless, environmentally friendly, does not affect water quality, reliable quality, and durable.WHAT YOU GET: x4 Aquarium Isolation Board Support Feet, can free splice combination and suitable for many fish tank isolation board, can meet your different needs. Many uses.