MASTER & MASTER LLC, dba​

CHINA MASTER (USA) ENTERPRISE CO., LTD

1930 S. BREA CANYON RD #120, DIAMOND BAR, CA 91765 USA

Tel: 626-810-9372  | Fax: 888-496-1282 | Email: info@ChinaMasterUSA.com

Surface Roughness

We engineer and produce complex industrial ceramic parts for our customers. 

On time, and on budget.


Older drawings may use roughness grade numbers to indicate Ra value.  The following table is gven in ISO 1320:1992.