The fish tank divider is made of food-grade plastic material, which is non-toxic, tasteless and environmentally friendly and will not affect water quality. Using a grid divider can effectively separate the fish and prevent from biting each other. the rate of baby fish and separate diseased fish from aggressive fish. Size: 11.8 x 5.9 x 0.3 inches (about 30.0 x 15.0 x 0.8 cm); using these dividers, you can divide the fish tank into multiple compartments for breeding or separation. The plastic grille can be cut and combined freely, and the suction cup clamp can be fixed anywhere in the aquarium. Colour: black Material: plastic Package Contents: 4 * black grid dividers 8 * suction cup clips Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.