Heavy Wall Tube - 50mm x 3.5mm (9) - Pyrex - Borosilicate Glass - 33 COE
PTFE Tube ID 14mm x 16mm OD F46 Insulated Capillary Heat Protect Transmit Hose Rigid Pipes Temperature Corrosion Resistance 600V - 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