... for blood sedimentation in clinic,in labs/hospitlas . 2 CE ,ISO13485 ,FDA Certificate L6031 Erthrocyte Sedimentation Rates Tube L6032ESR Tube ,black ... Brand : Sorfa or OEM . 2 International quality approvals: CE, ISO9001, ISO13485, FDA ect. 3 Material : PS/PE/PET/Glass . 4 Additive ... ,sterile ,Non-toxic and pyrogen free ESR Tube with CE,ISO13485,FDA