zxxin-Clear Flexible Tubing 1M/3M Transparent PVC Tube, 4-10mm Out Diameter, Flexible Silica Gel Soft Hose, Oxygen Tube Air Line Lightweight and Durable : Amazon.co.uk: Business, Industry & Science
Soft Clear-Metric PVC Tubing for Air and Water - Inner Diameter 20 mm - Outer Diameter 25 mm - 10 ft - Walmart.com