1pcs 6mm-11mm Inner Diameter High Transparent Organic Glass Tube Acrylic Pipe Length Cut Hollow Duct Vessel 300mm L 11mm-15mm Od - Pipes - AliExpress
Amazon.com: MECCANIXITY Acrylic Pipe Clear Rigid Round Tube 18mm(0.7") ID 20mm(0.8") OD 10" for Lamps and Lanterns, Water Cooling System 4pcs : Industrial & Scientific
Uxcell PVC Pipe Round Rigid Plastic Tube 12mm ID 14mm OD 500mm White for DIY Decoration