4 pieces of 50mm black anodised MakerBeamXL. MakerBeamXL width and height = 15mmx15mm, available in different lengths.
We have drawings available (.STP, .DXF, .PDF)
Makerbeams are available in different lengths. The beams are anodised in black or clear, have a hollow core and have threaded holes each end. You can find an overview of specifications of all our beams - MakerBeam, MakerBeamXL and OpenBeam here.

You can find drawings of more products here.