uxcell Black PVC Tube Wire Harness Tubing, 3/16-inch(4.5mm) ID 23ft Sleeve for Wire Sheathing Wire Protection: Amazon.com: Industrial & Scientific
1'' ID × 1-1/4'' OD - 50 ft Clear Plastic Vinyl Tubing, Flexible PVC Hose Lightweight Non-Toxic vinyl Tube for Transfer Water Air Oil: Amazon.com: Industrial & Scientific
MECCANIXITY PVC Rigid Round Pipe 45mm ID 50mm OD 350mm Dark Grey High Impact for Water Pipe,Crafts,Cable Sleeve: Amazon.com: Tools & Home Improvement