These high-quality, 4ml vacuum blood collection tubes are designed for efficient and reliable serum sample collection. Each tube features a clot activator (silica – SiO2) to ensure rapid and complete blood clotting. Packaged 100 tubes per box, these tubes are perfect for clinical laboratories and healthcare settings.
US: temporary delays — postal services aligning new import rules, 
EU: 1–2 weeks, 🌍 Worldwide: 1–4 weeks ✈️