FixtureDisplays Clear Transparent Plexiglass Acrylic Tube 4" (101mm) diameter x 24" (609mm) long, 5/64" (2mm) Wall Thickness. Made from high quality acrylic. Great clarity. Easy to work with, can be saw cut, drilled, painted, lasered, glued, and heat formed. Use in any DIY projects such as industrial, science, plumbing, design, models, aquariums, crafts, and much more. Overall measures 24" long, 4" outside diameter, 5/64" (2mm) wall thickness. Weight is 1.03 lbs. To purchase acrylic glue please follow this asin: B08T8ZC1FJ. For clear acrylic disc: B07L61X48Y. For clear acrylic sheets: B01IUT4I7I. Recommend FixtureDisplays acrylic glue solvent based plexiglass cement item number 11310. Asin is: B08T8ZC1FJ Diameter and length measurements are nominal. If your needs are scientific and requires high precision, please contact us prior to making your purchase. Exact diameter is 99.9998 mm (3.937 inch). If your requirement is precise, contact us prior to your purchase. To order caps, please follow this asin B0BRSMF53C 【Assembly Video】Video Instructions link: You can search "15139 24 4 inch 100mm diameter 2mm thick clear acrylic plexiglass tube fixturedisplays" on youtube to locate the video. FixtureDisplays Clear Acrylic Tube 4" (nominal) Diameter (3.937" exact outside dim) x 24" Long, 5/64" (2mm) Wall Open Ended 15139-24"-1PK-NPF