MECCANIXITY PVC Rigid Round Pipe 33.5mm ID 40mm OD 0.3 m Clear High Transparency for Water Pipe, Aquarium, Fish Tank : Amazon.ca: Tools & Home Improvement
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