Feature: 1. NANO AIR OUTLET: Aquarium bubble diffuser adopts nano ceramic sheet air outlet, high density, breathable, more delicate bubbles. 2. HIGH TRANSPARENCY: Aquarium bubble diffuser has high transparency, ornamental, can be used in freshwater saltwater tanks. 3. EASY TO USE: Compact aquarium dissolved oxygen diffuser, exquisite, delicate feel, can be used with small and medium sized fish tanks, easy to install. 4. EFFICIENT AIR REFINER: Purify and oxygenate the water in your fish tank, creating a healthy and vibrant environment for your aquatic pets. 5. OXYGEN PUMP DIFFUSER: Produce ultra fine bubbles that increase the oxygen content in your aquarium, promoting the growth and vitality of your fish and plants. Specification: Item Type: Fish Tank Bubble Diffuser Material: Glass, Quartz Sand Usage: Air Refiner, Oxygenator, Bubble Stone Oxygen Head. Package List: 1 x Refiner2 x Suction Cups1 x Air Volume Adjustment Valve1 x Check Valve1 x U tube