uxcell Round Aquarium Pump Hydroponics Diffuser Bubble Air Stone, 4" Package Content: 1 x Aquarium Air Stone; Total Size: 10 x 7 x 1. 5cm/4" x 2. 8" x 0. 6"(OD*Inner D*T) Color: Blue, Orange; Material: Mineral, Plastic Product Name: Aquarium Air Stone Weight: 10g Fit Hose Diameter: 5mm/0. 2"