1/2" to 8" Diameter: Clear PVC Pipe, sch40 *Choose Your Length up to 10 FT Long! | eBay
6"-OD x 5.75"-ID x 11 7/8"-Long Clear Extruded Plexiglass Acrylic Tube
Acrylic Pipe Clear Rigid Round Tube 2pcs 54mm ID 60mm OD 6" for Lamps and Lanterns, Water Cooling System - Walmart.com
6"-OD x 5.75"-ID x 11 7/8"-Long Clear Extruded Plexiglass Acrylic Tube
POWERTEC 6 in. x 36 in. Long Clear Pipe Rigid Plastic Tubing for Dust Collection 70274 - The Home Depot
5 CLEAR ACRYLIC PLEXIGLASS THIN WALL TUBES 1/4” OD DIAMETER 1/8" ID 18” LONG | eBay
Amazon.com: 10 Lengths - 1/2" OD x 1/4" ID x 6" INCH LONG CLEAR ACRYLIC PLEXIGLASS LUCITE TUBES - .50" Diameter - 12.7mm x 152.4mm : Industrial & Scientific