Aquarium Fish Tank Air Stone Curtain Bubble Bar Tubes Pump Wall Diffuser Aerator Color: green orange, pink, yellow Function description: Connect to the air pump and put it into the water to help the air pump pump oxygen into the water Weight: 7 inch 17.8cm weighs 10 grams, 10 inch 25.4cm weighs 12 grams Material: Plastic material, very light in texture (with suction cup, dont worry about floating) Package includes:1 * Special Sand Bar Features: 1. Always use, dont worry about clogging, removable and washable, both fresh and sea water are available 2. It can extend the life of the air motor, save power and reduce noise 3. The amount of air bubble is uniform, increasing the amount of dissolved oxygen in the water 4. Customizable drilling and adjustment according to the needs of the density in the cylinder