Amazon.com: FengWu 2PCS Acrylic Tube 4'' (100mm) OD x 2mm Wall Thickness Clear Plastic Pipe Tube 15.5'' Length Clear PVC Pipe Round Polycarbonate Tubing Chemical Resistant : Industrial & Scientific
MECCANIXITY Plastic Pipe Rigid Polycarbonate Round Tube Clear 1.85"(47mm) ID 2"(50mm) OD 9.6" (245mm) High Impact for Lighting, Models, Water Plumbing - Amazon.com
Amazon.com: 4PCS Rigid PETG Tube 50mm (2") OD x 2mm Wall Thickness, 16.5" Length PC Rigid Round Clear Tubing Unbreakable Polycarbonate Tubing Chemical Resistant Clear Tube : Industrial & Scientific
Amazon.com: uxcell PVC Rigid Round Clear Tubing, 30mm ID x 32mm OD, 0.5m : Industrial & Scientific