... Citrate: 1: 9 Body: glass, PET, PP. PT tube:Cap color: blue.Standard:CE, ISO13485.Specifications: 13*75, ... 0 -37General Sampling Dosage: 1.8ml, 2.7mlMaximum Vacuum Tolerance: ±10%Description: PT tubes are applicable to ... 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 ...