HOD HEALTH AND HOME Australia has been operating online and instore for 8 years. All products come with a 1 year warranty, fast shipping and special offers added to our site daily.. Features High-Quality Sintered Air Stone Designed For Fine And Consistent Oxygen Diffusion Durable Recyclable Material With Excellent Heat Resistance For Long-Lasting Use Produces Ultra-Fine Bubbles To Improve Oxygen Levels And Water circulation In Your Aquarium Dual Connection Design For Easy And Secure Air Hose Attachment Simple To Maintain And Clean For Extended Performance Suitable For Freshwater And Marine Aquarium Setups Specifications Material: High-Temperature Sintered Stone Composite Type: Aquarium Air Diffuser / Air Stone Connection: Dual Inlet Port Design Bubble Output: Fine Micro Bubble Dispersion Usage: Requires External Air Pump And Tubing (Not Included) You Will Receive 1 X Aquarium Air Stone Diffuser