Suitable for tanks under 300L. New and high quality. Protein skimmer uses venturi protein separation technology. Dirt and waste substances are collected in the top container. Includes suction cups, air stone, and 49cm long tubing. This skimmer must be used with an existing pump (pump not included). The air stone generates fine bubbles to effectively separate protein and waste from aquarium water. Both models are suitable for tanks under 300L. For optimal bubble generation, a pump under 5W is recommended. No complicated assembly requiredsimply attach the suction cups to the inner wall of the tank. Color: As shown in image. Material: Plastic-4003. Flow rate: 600L/H. Cup size: 8x23cm. Air stone dimensions (LxWxH): 5x2x2cm (approx.). Tube length: 49cm (approx.). Package includes: 1 x protein skimmer. Only the items listed are included; other accessories are not included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement allowance: +/- 1-3cm.