2 Pcs Aquarium Nano Aeration Air Stone Bar Micro Bubble Diffuser for Fish Tank Aquarium Aeration Natural Safe Fish Features: Micro bubbles dissolve more oxygen into water and burst peacefully on the water surface. The abundant cascades of tiny bubbles is perfect for your fish, betta, shrimp, and all kinds of aqua creatures. Durable frosted material with small vent holes, fine air bubbles and better atomization effect. Low-pressure mute is more energy-saving, with a large suction cup to fix the air pipe to prevent the air bubble from sliding. Specification: Type: Nano Oxygen Stone Material: White corundum + Alumina Applications: for Fish Tank Aquarium Aeration Features: Nano Oxygen Stone, Aquarium Nano Aeration, Micro Bubble Diffuser, Aeration Natural Safe, Fish Farming Supplies Dimension: app.10cm/3.94in Color: White+black Quantity: 1 Set Note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 2 Pcs x Nano Oxygen Stone