The erythrocyte sedimentation tube is used for the determination of red blood cell sedimentation rate. It contains 3.2% sodium citrate solution for anticoagulation, and the ratio of anticoagulant to blood is 1:4. Slender erythrocyte sedimentation tube (glass) with erythrocyte sedimentation rack or automatic erythrocyte sedimentation rate instrument, 75mm plastic tube with Wei's erythrocyte sedimentation tube for testing