I used to do purchasing in the laboratory. A variety of laboratory equipment due to different application environments, different precision requirements will produce different purchase options. If the experimental results of high requirements, you can consider imported brands, if the requirements are low, if the domestic is also OK. Now you can basically buy online, both the materials and instruments used in the experiment. Baidu Mu Muxili, I am here to buy or platform to buy convenient, you can pick and can compare.
I hope to help you.