Our microcentrifuge tubes feature easy-to-read graduations and smooth inner walls for easy filling and sample preparation. Crystal-clear polymer facilitates the visualization of samples. Our tubes are guaranteed non-pyrogenic, DNase/RNase free, and with endotoxin less than 0.1 EU. They can be safely used up to 30000xg rcf, with a temperature range from -80℃ to 120℃. These polypropylene tubes are autoclave-safe.