a stand for stable positioning
providing accurate motion tracking
5mm steel hoops
Premium Quality: Spiral Spring is made of high-grade construction all the way through
internal structure of the cerebrum
Metal Cylinder Set a stand for stable positioningMetal Cylinder Set B. Cylinder Set of 3 Kinds Metal, size Dia2x3cm, including Copper, Steel, Aluminum, Brass. C. Cylinder Set of 4 Kinds Metal, size Dia1x5cm, with knob, including Copper, Steel, Aluminum, Brass. D. Cylinder Set of 4 Kinds Metal, size Dia2x4cm, with knob, including Copper, Aluminum, Zinc, Iron. E. Cylinder Set of 5 Kinds Materials, weight 19g including Polyethylene, Polyvinyl Chloride aluminum, Nylon, Aluminum, Brass. All the Cylinders