PT tube: CE, ISO13485. Spec.:13*75, 13*100, 16*100 ... Additive:Sodium Citrate: 1: 9 Body: glass, PET, PP. PT tube: Cap color: blue. Standard:CE, ISO13485. Specifications: 13*75, ... blood sampling mixing it 5-6 times by turning the tube 180°. 2. Sampling the dosage as required to ... ensure the test accuracy. 3. This tube is suitable fixed to the double direction flexible needles.. PT tube