Four 30cm diameter 4 hole aluminum hubs with four set screws.
Structural parts feature 90 ° angles. Includes:
four 3 hole L shaped beams,
four 5 hole L shaped beams,
four 7 hole L shaped beams,
four 9 hole L shaped beams.
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
A variety of heavy-duty aluminum structural building plates: four 3×3 gusset plates, four 3×5 gusset plates, four 3×7 gusset plates, four 3×9 gusset plates, & four 5×5 gusset plates.