When you keep fish in your fish tank or in pond in your backyard, you have to realize that 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 tank Material: Soft silicone, Dimension: Φ4 * Φ6mm (Inner diameter and Out diameter) Good elasticity, better than most of peers in market Efficiently transport oxygen into water, increasing dissolved oxygen volume of the water Any problem, please contact our store without hesitation. Honor to serve you! Specifications: Item name: Oxygen Pump Hose Material: Soft silicone Color: Transparent Dimension: Φ4 * Φ6mm (Inner diameter * Out diameter) Length: 10m Weight: Approx 150g There might be