precision parallels are available in Laboratory Grade, Inspection Grade or Toolroom Grade. Our high-quality black granite parallels are MADE IN THE China and provide the strongest, most durable and stable surfaces available. Black granite has a heavier density and is..
Granite Parallel Master Product Application: 1. Mainly used as a benchmark support n modern industry and scientific research institutes, is an important auxiliary tool in the measurement of the platform. We are able to manufacture the Granite Surface Plate with the good and stable flatness.