1: Is the code of Wuxi Litong 223 16 bearing outer package (4 boxes, referring to the outermost box) written with a marker pen or typed out by computer?

A: There are four boxes. The outermost boxes are printed and ready-made, and some are added by hand.

2. Is Wafangdian 22230 packed in boxes or industrial packaging (there is no box, just wrapped with tape)?

Upstairs is correct.

3: 223 16c/W33FA What does this FA mean?

Answer: The chamfer is black.

Is the 4:223 16 retainer better for mining machinery, CA or CC?

Answer: CA and CC are widely used, and their endurance is improved by 30%, but the noise is high and the price is slightly higher.