cryo-EM copper grid, 200 mesh, 40 nm carbon, 4 um hole/2 um spacing
https://www.crosci.com/shop/boc-2500-13-cryo-em-copper-grid-200-mesh-40-nm-carbon-4-um-hole-2-um-spacing-71722
https://www.crosci.com/web/image/product.template/71722/image_1920?unique=0fa7945
cryo-EM copper grid, 200 mesh, 40 nm carbon, 4 um hole/2 um spacing : Size : 50 ea - Certification : Research Use Only - Storage : Ambient temperature .
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