4 Pack: 1 3/8 Inch (35mm) Square Black Plastic Tubing Plug, Pipe Tube Hole Cover, Steel Furniture Finishing End Cap
DMiotech 31mm x 35mm 20" Clear Acrylic Pipe Rigid Plastic Tubing for Aquarium Water Pipe, Water Cooling System, Plumbing : Amazon.co.uk: Business, Industry & Science
Plastic Threaded Tube Insert - RECT051
Rocwing Acrylic Clear Rigid Round Transparent Pipe Hollow Tube (1000mm Length, 35mm OD / 2mm W / 31mm ID)