Feature: 1. FINE WORKMANSHIP: High temperature roasted white corundum sand, the air refiner is more durable and resistant, good air permeability, long term use without damage. 2. THICKER L SHAPED INTAKE PIPE: Double suction cup fixed design, the fish tank air refiner is not easy to fall off, firm and durable. 3. WITH REGULATING VALVE: Equipped with gas regulation valve, better control of air volume, can adjust the air volume according to needs. 4. EXCELLENT PERFORMANCE: High dissolved oxygen and ultra quiet operation, high oxygen dissolving capacity, avoiding splashing water, very low water vibration, operating below 20 decibels. 5. FOR FISH TANK: Small size and high transparency, mini and exquisite, the air refiner disc does not take up space in the aquarium, transparent throughout, can blend with water plants. Specification: Item Type: Fish Tank Air Refiner Material: Acrylic, White Alumina Sand Application: Aquarium Air Refiner. Package List: 1 x Air Refiner 2 x Suction Cups 1 x Adjustable Valve