1.    Mainly made of plastic,aluminum and steel

2.    ABS top board,easy to clean

3.    Four columns

4.    C means:aluminum columns,D means:plastic-steel columns

5.    Rasied-edge design

6.    Guard rail

7.    1 middle drawer

8.    Plastic-steel column

9.    Storage shelf

10. Dust baskets

11. Luxurious noiseless casters(two with brakes)