Four 30cm diameter 4 hole aluminum hubs with four set screws.
This 4mm hub kit can connect wheels, gears, building components and more to Matrix axles. Includes: two 4mm hubs, eight 12mm M4, eight 24mm M4 screws, and two M4 set screws.
9 x 21 hole aluminum structural plate for large area coverage
A variety of flat heavy-duty aluminum structural parts. Includes: four 3 hole flat beams, four 5 hole flate beams, four 9 hole flat beams, & four 11 hole flat beams
Long aluminum structural beams with long sides bent to 90°. Includes: four 17 hole C shaped beams & four 21 hole C shaped beams