This structural seamless rectangle will measure 1.5 inch x 3 inch and will come with a 1/8" wall thickness. This aluminum square tube is a great addition to your 80/20 DY projects. This thin metal tube is made out of 6063-T6 aluminum metal with a natural mill finish. Clean square cuts make this perfect for home home improvement projects. Commonly used in industrial fittings, machinery and equipment, architectural decoration, DIY crafts, static models, frames, backyard projects, DIY projects, framing systems, and much more. Widely used in a variety of industrial structural parts that require a certain strength and corrosion resistance and with other 80/20 extruded aluminum profiles. This clean cut metal tube can be integrated with 8020 t-slotted aluminum extrusions with various joining brackets or plates to add more custom-ability to your build. 8121 is a 1.5” x 3” rectangle structural profile with a mill finish This profile lends itself to applications where you need an aesthetic look and clean, smooth surface such as framing, displays, trade show booths, retail kiosks, DIY projects, industrial settings, and much more.