Jardin Round Design Fish Tank Air Stone, Releases Bubbles, 1.5-Inch Diameter Product Name : Aquarium Bubbles Disk Air Stone; Suitable for : Tank, Aquarium Shaped : Disk Design; Material : Sands and Stone Total Size : 3.9 x 1.4cm/1.5" x 0.55"(D x T); Air Inlet Diameter : 3mm Color : Gray; Net Weight : 27g Package : 1 x Bubbles Disk Air Stone