uxcell U Shaped Glass Tube Bend Clear for Aquarium Fish Tank Co2 Oxygen Tubing Fit for: Aquarium Co2 or Oxygen Tubing Color: Clear; Inner Size: 15mm/0.59" Net Weight: 9g; Product Name: Glass Tube Material: Glass; Total Size: 46 x 7mm/1.81" x 0.28"(L*Max.D) Package Content: 1 x Glass Tube