The model of the powder, you will know. The product specifications of diamond shaping materials are: 30/40, 40/50, 50/60, 60/70, 70/80, 80/ 100,120,120.

The product specifications of the second-class diamond powder are: W50, W40, W28, W20, W 14, W 10, W7, W5, W3.5, W2.5, W 1, W0.5W0.25W0./kloc.