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Coagulation tube in foil packing 
CHGD coagulation tube  
Material PET
Cap color Blue
Additive 3.2% Sodium Citrate (1:9)
Specimen Whole Blood
Specification 13*75mm
Draw volume 2-5ml
Max. vacuum degree tolerance ±10%
the foil package stop the addtive escape from the PET tube, make the tube within it have a 2 years shelf time.Invert immediately after draw,gently invert tube 3 to 4 time.