
Disposable Vacuum Blood Collection Tube ESR Tube 3.8% Sodium Citrate. CE & ISO13485 Certified: Factory certified by ISO13485 & ISO9001, products approved by FDA, CE, and Ministry of Health. OEM & ODM Services: Over 30 years experience with own mold factory, 100+ engineers, and 150-200 new molds yearly. High Precision Additive: Contains 3.8% Sodium Citrate (0.129mol/L) with a 4:1 blood-to-additive ratio for accurate ESR tests. Flexible Volume Options: Available in 1.6ml, 2.4ml, and 3.2ml volumes to suit various testing requirements. Sterilization Options: Available in EB/Gamma sterilized or non-sterile versions to meet specific safety needs. Free Sample Availability: Free samples provided for small quantities; large quantities require sample fee with freight collect. Fast Sample Delivery: Sample delivery typically takes 3-7 days, or 10 days after receiving payment. Reliable Quality Control: 100% inspection during production with 100+ QC staff, plus random checks and sample retention.