4ml Self Standing External/Internal two types of 3.5ml or 4ml Cryovials Micro Tubes
Size in optional: 1ml,1.8ml,2ml,3ml,4ml,5ml,10ml

1. Manufactured from specially formulated polypropylene and designed for storage at temperatures as low as -196º C (only in the gas phase of liquid nitrogen)

2. Silicone washer inside the cap forms a tight, leakproof seal

3. Cap insert is available in many colors

4. The exteral thread design ensures not contribute to possible contamination.

5. Silicone washer inside the cap features a positive seal

6. 1-1/4 thread design for fast and convenient sealing.

7. Thick wall makes vials almost unbreakable.

8. Large white marking area and graduations in 0.2ml increasements.

9. Neutral vials come without assembled cap insert