uxcell PVC Clear Vinyl Tubing, 4mm(5/32") x 6mm(1/4") Plastic Tube Flexible Water Pipe 5m - - Amazon.com
Amazon.com: 2 1/2 Inch Diameter Clear PVC Schedule 40 Pipe [Pipe ID 2.445 inch, OD 2.875 inch] (Bluish tint), Choose Your Length (5 Inches to 8 Feet) (Selected Length: 1 Foot) : Industrial & Scientific
Amazon.com: Extruded Acrylic Rigid Round Tube, Clear, 5-3/4" ID x 6" OD x 12" L : Industrial & Scientific
Amazon.com: Evergreen Plastic Material Round Rod, Diameter 0.08 inches (2.0 mm), Length 13.8 inches (35 cm), Pack of 6 : Toys & Games
HAUTMEC Pro 1/2 Inch Automatic Copper Tube Cutter - 1/2 in. Maximum Nominal Pipe Capacity (5/8 in. Outer Diameter) for PVC, Copper, Aluminum, and Thin Stainless Steel Tube HT0215-PL - - Amazon.com