The oxygen hose has good toughness, is resistant to pulling, and can be used for a long time. Environmental protection, no peculiar smell, will not pollute the water quality and affect the health of the fish. With good air tightness and easy replacement, this oxygen tube is an indispensable accessory for delivering oxygen and water to your fish, providing your fish with a comfortable and fresh water environment. Made of premium PVC material, the aquarium oxygen hose is eco-friendly and durable. The inner diameter of the product is about 0.4cm, and the outer diameter is 0.6cm. And the lengths are 150cm, 305cm. It is suitable for most fish tank air pumps, etc, Item Name: Oxygen Hose Material: PVC Features: Eco-friendly, Portable, Widely Compatible Size Details: A, Length: 150cm/59.06"(Approx.) B, Length: 305cm/120.08"(Approx.) Wall Thickness: 0.1cm/0.04" (Approx.) Inner Diameter: 0.4cm/0.16" (Approx.) Outer Diameter: 0.6cm/0.24" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. It cannot be used to deliver ozone. Package Includes: 1 x Oxygen Hose