Soft Blue Tinted PVC Tubing for Air and Water - Inner Diameter 3/4" - Outer Diameter 1" - 50 ft - Walmart.com
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
Amazon.com: 3 Inch Diameter Clear PVC Schedule 40 Pipe [Pipe ID 3.042 inch, OD 3.500 inch] (Bluish tint), Choose Your Length (5 inches to 8 feet) (Selected Length: 4 Feet) : Industrial & Scientific
3/8" Clear Schedule 40 PVC Pipe - 5 ft.
Charlotte Pipe 3-in x 10-ft PVC DWV Foam Core Pipe in the PVC DWV Pipe & Fittings department at Lowes.com
Amazon.com: 1 Foot Long plastic plexiglass tubes, Clear acrylic PVC pipe transparent for 3 inch PVC fittings, 3 1/2 inch 89mm diameter tube, 1/10 inch thick tubing : Industrial & Scientific