Feature: 1. [White Corundum Sand] The fish tank air refiner is made with high temperature fired white corundum sand, sturdy and breathable, ensuring long lasting without damage. 2. [Thickened Inlet Pipe] The refiner is designed with a thickened L shaped inlet pipe and dual suction cup fixation, ensuring it remains securely in place without easily moving. 3. [High Oxygen Dissolution] This aquarium oxygen air refiner delivers a high oxygen dissolution rate, promoting a healthy and oxygen rich environment for your pets. 4. [Ultra Quiet Operation] Operating at less than 20 decibels, this air refiner operates with ultra quiet performance, ensuring a peaceful ambience for both the fish and the aquarium owner. 5. [Compact and Transparent] With its small size and high transparency, this exquisite air refiner seamlessly blends into your aquarium. Specification: Item Type: Fish Tank Air Refiner Material: Acrylic, White Corundum Sand Use: Fish Tank Air Refiner . Package List: 1 x Fish Tank Air Refiner 2 x Suction Cups