Amazon.com: 50-FT Food Grade Vinyl Tubing, 3/8'' ID x 1/2'' OD : Industrial & Scientific
uxcell PVC Heat Shrink Tube 180mm Flat Width Wrap for Dual Layer 18650 1 Meter Clear: Amazon.com: Industrial & Scientific
AC PERFORMANCE Aluminum 2 Inch 180 Degree Tube, Brush Finished
Amazon.com: 10 Feet - 3/8" ID 1/2" OD Clear Vinyl Tubing Food Grade Multipurpose Tube for Beer Line, Kegerator, Wine Making, Airline Tubing for Aquarium, Air Water Hose, Fuel Line by Proper