General purpose microcentrifuge tubes with SnapLock cap.

Cole-Parmer microcentrifuge tubes include an attached cap. All tubes feature a frosted writing surface on the tube and are graduated. Tubes are available in assorted colors (tube and cap) for quick sample identification. Boil-proof tubes are guaranteed to stay closed, even during boiling or autoclaving. All tubes are certified RNase-, DNase- and endotoxin-free for highest sample integrity