Product Name : Aquarium Air Stone;Stone Size : 24 x 15 mm / 0.9" x 0.6" (L*D) Connector Size : 4 x 2.5mm / 0.15" x 0.09" (Outer Dia*Inner Dia);Total Length : 38mm / 1.4" Material : Mineral, Plastic;Color : gray Weight : 66g 10 pcs gray mineral bubble air stone, help to refresh the dissolved oxygen in tank water and keep fish live in a better environment. Produce mini bubbles, increase the breeding density, effectively create water currents and improve water quality in tanks. Package Contents : 10 Pcs x Aquarium Air Stone Note: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.
