Gray Round Shape Air Pump Airstone for Aquarium Tank Fish

Aquarium AirstoneMain Color : GrayMaterial : Mineral Stone, PlasticStone Size : 4 x 1.5cm/ 1.6" x 0.6"(D*H)Outlet Hole Dia. : 3mm/ 0.12"* It is for freshwater, saltwater aquarium and hydroponic use.* Its used to increase the dissolved oxygen level in the aquarium.* It produces fine bubbles making it efficient in the replacement of Oxygen in fish ponds, tanks or hydroponic systems.* Weight : 28g* Package Contents : 1x Aquarium Airstone,1 x Straight PipeNote:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.