Amazon.com: Dracaena 1 meter/39.3 inch soft tube with PVC material, ID 3/8'' and OD 5/8''- PVC pipe soft tube for Computer water cooling systems (Transparent) : Electronics
uxcell PVC Hose Tube, 10mm(0.39") ID x 13mm(0.51") OD 1.5m/4.9ft Clear Vinyl Tubing, Plastic Flexible Water Pipe - - Amazon.com