1.    Mainly made of plastic,aluminum and steel

2.    ABS top board,easy to clean

3.    Four columns

4.    B means:plastic-steel columns

5.    Raised-edge design

6.    Storage box

7.    SUS304 guard rail

8.    Centralized lock

9.    Plastic-steel column

10. 3 middle drawers

11. Dust basket

12. 1 big drawer

13. Luxurious noiseless casters(two with brakes)