Sewa Medicals Limited supplies Blood Collection Glass Vacuum Tubes. Sewa Medicals Limited offers various types of Glass Prefillable Syringe Components. The Blood Collection Glass Vacuum Tubes are ready made High Quality evacuated tubes that have precisely controlled vacuum to cater to an exact draw volume for blood testing. This smooth, easy to handle device provides a quick & safe method of blood collection, also increasing clinical accuracy. This highly advanced Blood Collection Glass Vacuum Tubes is available in all standard additives.