1. Material: ABS
2. High adaptability to real machine, strong practicability
3. Strong and durable, not easy to damage
4. Long service life
5. Diameter of the top of the adapter: 3.8 cm
6. Diameter of the bottom of the adapter: 3.5 cm
7. Adapter length: 9.1 cm
8. Shelf size: about 17x8x8lm
9. Weight: about 160 grams for the shelf, about 45 grams for the adapter
10. The set includes: a shelf, 2 adapters, 4 expansion tubes, 4 screws