<div class="detailmodule_html"><div class="detail-desc-decorate-richtext"><p>Features:</p> <p>&nbsp;</p> <p>Increase oxygen levels, lower CO2 and raise PH, creates water currents</p> <p>It is an important instrument to successfully keep aquatic fish for respiration process.</p> <p>Durable, can be reused and washed repeatedly.</p> <p>Strong Suction Cup.</p> <p>Rotary design to control the bubbles.</p> <p>Creates bubbles in fish tank while attached to an air pump(air pump and air tube is not included).</p> <p>&nbsp;</p> <p>Specifications:</p> <p>&nbsp;</p> <p>Color: Black</p> <p>&nbsp;</p> <p>Material: plastic</p> <p>&nbsp;</p> <p>Item Size: About 6cm long</p> <p>&nbsp;</p> <p>Air Tube: Inner dia. 4mm.; Outer dia. 6mm</p> <p>&nbsp;</p> <p>Package include:</p> <p>&nbsp;</p> <p>1pc Aquarium Air Bubble Stone</p> <p>&nbsp;</p> <p>Note:</p> <p>&nbsp;</p> <p>-Soak in water for 15 minutes before use.</p> <p>&nbsp;</p> <p>-For long-term use, if there is dirt blockage, and the bubbles is reduced, please take it out of the fish tank and wash it again and again.</p> <p>&nbsp;</p> <p>-The air stone can be used repeatedly.</p> <p>&nbsp;</p> <p>-Please allow 1cm differs due to manual measurement.</p> <p>&nbsp;</p> <p>-Due to the different display and different light, the picture maybe a little different with the actual color of the item. Thanks for your understanding.</p> </div></div>