1、Made of acrylic material, safe, non-toxic, sturdy and durable. 2、The water flows evenly disperse, prevent aquarium organisms, water plants and gravel entering the overflow chamber. 3、Can be placed in the middle of different connected aquarium as a fish interceptor. 4、High transparency, easy to clean, harmless for fish and coral. 5、Suitable for fish tank aquarium. Features: 1.Made of acrylic material, safe, non-toxic, sturdy and durable. 2.The water flows evenly disperse, prevent aquarium organisms, water plants and gravel entering the overflow chamber. 3.Can be placed in the middle of different connected aquariums as a fish interceptor. 4.High transparency, easy to clean, harmless for fish and coral. 5.Suitable for fish tank aquarium. Specifications: Item type: Aquarium Weir Comb Material: Acrylic Weight: Approx. Color: black Size(length x width x thickness): Approx. 22.7x5x4cm/8.9x2x1.6in( fir for 23cm/9.1in grooves.) Suitable for overflow box. Packing List: 1 x Aquarium Weir Comb Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.