The non acuum blood collection tube was made of PS or PP material and owing to the siliconization treatment on the inner surface, the tube is very smooth inside without blood adhesion. High quality gel makes the serum separation complete with no fibrin adhering to the inner surface of the tube.Inside the tube, there uniformly sprays the quantitative anticoagulant with protection liquid for blood platelets,which effectively prevent the gathering of blood platelets,thus guarantee the accuracy and reliability of the feature of high performance-price ratio PLAIN TUBE