Description: 1.The tube is using Sodium Fluroide and Potassium Oxalate as additive.Grey closure. 2. Specimen:plasma.It's used for glucose determinations.3. Specs:1375 mm 4.Draw volume:2 ml ,3ml 5.Storage temperature:4-25 6. Max. vacuum degree tolerance:10% 7. Invert the tube 6-8 times gently.