Place of Origin : Hefei,China  
                                                         
1.Black: 3.8% ratio of the sodium citrate to blood samples is 1:4 for the whole blood 
2.13 x 75mm for 1.6ml and 2.4ml, used for blood sedimentation test (e.s.r) 
3.Operation procedures: mix well by inverting 8 times after collection 
4.Mix well the specimen before test 
5.Green: heparin sodium and lithium, for plasma 
6.13 x 75mm for 3ml and 5ml 
7.Used for rapid plasma biochemical test (heparin sodium can not be used for determining hemorheology)