Cryovial GREEN Cap Freezing Tubes, 4 ml/ PK300 -Free of detectable DNase, RNase, human DNA -Non-Pyrogenic, non-cytotoxic -CE-marked -Made of high-grade polypropylene which guarantees high thermal resistance in a temperature range from -196°C to +121°C -Round bottom -Working volume: up to 4.0 ml -Diameter: 12.5 mm; total height incl. lid: 83 mm -Starfoot base and external thread -White, scratch-resistant writing area -Green screw cap -Sterile