Description Function: 1. Made of high quality acrylic material, beautiful and durable, with high light transmission. 2. With a comb to secure the overflow box guide, it can evenly disperse water and can prevent fish, aquatic plants, and other debris from entering the overflow box. 3. With a movable cover at the outlet of the overflow box, it effectively reduces noise and prevents debris from entering the overflow box. 4. ma check valve outlet pipe, can be pumped through the attached syringe, quickly empty the inside of the first overflow box, easy to start the overflow box. 5. Suitable for aquarium, aquarium. Specification: Item Type: Aquarium Overflow Box Material: Acrylic Weight: approx. 2695 g Color: as shown in the picture Size when folded (length x width x height): approx. 23x18,2x29 cm/9,1x7,2x11,4 inch Overflow comb length: approx. 22,5 cm/8,9 inch Diameter of loose water outlet connector: approx. 32mm/1.3in Flow rate: 5000L/H Product introduction: the overflow box is attached to the edge of the aquarium and connected to the filter system at the bottom of the aquarium. After starting the overflow box, the aquarium water can be pumped into the aquarium through the circulation pump and then flowed through the overflow box into the studzienki, so that the aquarium circulation process can be easily carried out without turning the hole in the bottom of the aquarium. List of packages: 1 x Overflow Box 1 x Overflow Comb 1 x Working Drum 4 x Screw 1 x Air Pipe 1 set x bottom connector (4 pcs. )