“When you keep fish in your aquarium or in a pond in your garden, you have to understand that oxygen is one of the most determining factors for the life of fish. This is why, in addition to a pump with qualified oxygen, we recommend that you buy this silicone oxygen pump. It is flexible but durable, as it will efficiently transport oxygen in water, increasing the volume of dissolved oxygen in water and providing fish a comfortable and fresh living environment. features: Very light and soft professional oxygen pump hose for aquarium Material: Soft silicone, Dimension: 4 * 6mm (inside diameter and outside diameter) Good elasticity, better than most market peers Transport oxygen efficiently in water, increasing the volume of dissolved oxygen in water Any problem, please contact our store without hesitation. Honor to serve you! Characteristics: Item name: oxygen pump hose Material: soft silicone Color: transparent Dimension: * 4 *? 6mm (inside diameter * outside diameter) Length: 10m