The mall specializes in producing and selling high-purity experimental products for "scientific research institutes, universities and other" scientific research institutions and laboratories. For experiments, we should buy high-cost and high-purity products instead of low-cost and low-purity products. We should buy according to the actual use. Although the purity of industrial products looks the same. We should avoid low purity industrial products entering the laboratory, which will affect the accuracy of experimental results.

50mm-50mm-1.0mm in the option is equivalent to the size of foam titanium with length of 50mm, width of 150mm and thickness of 1.0mm. The meaning of other specifications in the option is the same.