Are you looking for a professional but reasonably priced Air Stone? Are you looking for a solid and trustworthy bubble stone that can accomplish multiple tasks? If so, please look no further! Our air stone must meet your needs. This fish tank air stone is your . Features -Color:Assorted Color -Material:Sand, plastic -Size:4.80X1.50X1.50cm/1.89X0.59X0.59in -Note:Suitable for hose with inner diameter of 4mm. - These air stones can be used at fish tank,pond,aquarium,freshwater, saltwater aquariums, hydroponic. -Simple appearance, small size, and Air Stone will not take up too much space in the fish tank. -This aquarium air stone is delicate and home and park aquarium decoration. Suitable for freshwater, seawater aquariums, hydroponics or fish tanks. -This aquarium air stone is not only sturdy and durable, but also has good heat dissipation and filtering properties. -The aquarium bubble stone is made of high-class materials, strong and durable, and has a . Package list: 5 x stone 5 x white air stone