Condition: Brand NewItem Type: Nano Air StoneMaterial: ABS + Nano StoneColor: As Pictures ShownOptional Size: S, MS Size: Approx. 10x4cm/3.94x1.57inchM Size: Approx. 20x4cm/7.87x1.57inchUsing instructions:1. Used for fish tank increasing oxygen, used with air tube and oxygenator2. Please soak the product in water for 15 minutes before use3. Long-term using, such as dirt blocking, bubble reduction, can be taken out to clean repeated useUsing tips:Under the condition that all the accessories of the air pump are connected well, repeatedly unplug the tube of the back door of the fine adjustment valve, let the tube add water, can quickly achieve the effect of atomization1、High dissolved oxygen rate, release a large number of fine bubbles, increase the contact area with the water surface, promote water circulation, increase dissolved oxygen. 2、Fine bubble, durable frosted material fine air outlet, the bubble is more delicate, achieve the effect of atomization. 3、Low pressure mute and more energy saving, less than 30 db, 1 w air pump can be driven. 4、With large suction suction cup, can better fixed air pipe to prevent the bubble stone running. 5、Made of high quality materials, sturdy, durable and long service life.