Amazon.com: Dracaena 1 meter/39.3 inch soft tube with PVC material, ID 3/8'' and OD 1/2'' - PVC pipe soft tube for Computer water cooling systems, Transparent : Electronics
MECCANIXITY Acrylic Pipe Clear Rigid Round Tube 31mm(1.2") ID 35mm(1 3/8") OD 6" for Lamps and Lanterns, Water Cooling System - Amazon.com