When you keep fish in your fish tank or in pond in your backyard, you have to realizethat oxygen is one of the most key factors to affect fish's living. So besides a qualified oxygen pump, we recommend you to buy this silicone oxygen pump hose! It's soft but durable in use. It will efficiently transport oxygen into water, increasing dissolved oxygen volume of the water, providing fish with a comfortable and fresh living environment.Features:Very light and soft, professional oxygen pump hose for fish tankMaterial: Soft silicone, Dimension: 4 * 6mm (Inner diameter and Out diameter)Good elasticity, better than most of peers in marketEfficiently transport oxygen into water, increasing dissolved oxygen volume of thewaterAny problem, please contact our store without hesitation. Honor to serve you!Specifications:Item name: Oxygen Pump HoseMaterial: Soft siliconeColor: TransparentDimension: 4 * 6mm (Inner diameter * Out diameter)Length: 10mWeight: Approx 150gThere might be some deviation due to manual measurement.Package Information:Package size: 13* 13* 5cm / 5.1* 5.1* 2inPackage weight: 151gPackage List:1 * Oxygen Pump Hose 10m