uxcell 10PCS Home Aquarium Fish Tank Bubble Air Stone Aerator Diffuser 25mm Product Name : Aquarium Air Stone; Stone Diameter : 25mm1" Connector Size : 5x 2.5mm0.2" x 0.1"(Outer diameter*Inner diameter); Total Length : 39mm1.5" Material : Mineral, Plastic; Color : Blue Weight : 134g Package Contents : 10Pcs x Aquarium Air Stones