The V-shaped granite block is made of "Jinan Qing" granite material processed by machinery and finely ground by hand. Black luster, precise structure, uniform texture, good stability, high strength, high hardness, granite V-shaped block, and has the advantages of high precision, no rust, acid and alkali resistance, non magnetization, invariance, good wear resistance, etc. It can maintain stability under heavy load and general temperature.

Granite V-shaped blocks are ideal reference surfaces for the inspection of instruments, precision tools, and mechanical components, especially for high-precision measurements.

Granite V-shaped blocks are made from underground rock layers and have undergone billions of years of natural aging, resulting in stable shapes without worrying about deformation due to conventional temperature differences. The granite material selected through rigorous physical testing is finely crystallized and has a hard texture. Due to its non-metallic nature, granite has no magnetic reaction and no plastic deformation. Its hardness is high, therefore it has good accuracy retention. Even if the granite V-shaped block is bumped by heavy objects during use, at most a few pieces of gravel will fall off.

Granite V-shaped blocks are superior to precision measurement reference parts made of cast iron and steel, and can achieve high and stable accuracy