Feature: 1. Made of high-grade acrylic material, beautiful and durable, high light transmittance. 2. With overflow box guide protection comb, can make the water evenly dispersed, and can prevent fish, aquatic plants and other debris into the overflow box. 3. With movable cover at the overflow box outlet, effectively reduces noise and prevents debris from entering the overflow box. 4. The outlet pipe has check valve, can be pumped through the attached syringe, quickly exhaust the inside of the first overflow box, easy to start the overflow box. 5. Suitable for fish tank, aquarium. Specification: Item type: Fish Tank Overflow BoxCondition: 100% brand newMaterial: acrylicWeight: Approx. 2695gColor: As picture shown Assembled size(length x width x height): Approx. 23x18.2x29cm/9.1x7.2x11.4inOverflow comb length: Approx. 22.5cm/8.9in Water outlet loose joint diameter: Approx. 32mm/1.3inFlow: 5000L/HProduct introduction: The overflow box is attached to the edge of the fish tank and connected to the filter system at the bottom of the fish tank. After starting the overflow box, the water in the aquarium can be pumped to the aquarium through the action of the circulating water pump, and then flowed through the overflow box to the sump, so that the circulation process of the aquarium can be easily realized without turning the hole at the bottom of the aquarium. . Package List: 1 x Overflow box1 x Overflow comb1 x Work drum4 x Screw1 x Air pipe1 Set x Bottom connector(4 pcs)