The tube is dispensed with separating gel and clot activator. This clot activator tube is used for blood collection and storage for biochemistry, immunology, element trace, various types of virus detection and so on for clinical tests. Invert 5-6 times after blood collection, and wait for 30 minutes before centrifuge. Centrifuge shall be set as 1500-1700 RCF for 10 minutes.