DescriptionAre 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 best choice.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 Stonewill not take up too much space in the fish tank. -This aquarium air stone is delicate and very suitable for 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 long service life.