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.    Guard rail

6.    Rasied-edge design

7.    1 middle drawer

8.    Aluminum column

9.    Rotatable dust basket

10. Luxurious noiseless casters(two with brakes)