Package dimensions 10.8 x 10.4 x 7.3 cm; 360 grams Medium Bubbles: The air stone produces dense, abundant bubbles to aerate your water tanks. A great way to increase oxygen solubility in aquariums, fish tanks, or ponds. Model: ASR-100; Jet volume: 15 L/min; Recommended air pump power: > 4W; Standard ID Air Hose: 0.5cm or 0.9cm. Ideal for aquariums, DWC systems, or ponds. Reliable Material: Made of mineral material and sintered at high temperature, it has no effect on the health of your aquatics. Helps maintain healthy fish or root growth. More Float: Measures 10D x 3.8H (cm) and weighs 328g. Its wide, flat bottom keeps it stable in the tank to produce more stable bubbles. Easy to use: Completely soak the stone in water for more than 3 hours before use. Clean it regularly with a brush as it may clog after weeks or months of use.