0.1ml 8-Strip, Flat-top, Clear Tubes and Clear Caps 125 Strip Tubes+125 Strip Caps/Pack Made of prime virgin polypropylene Ultra thin-wall offers high degree of transparency, easy for observation and heat conduction Domed caps ensure efficient heat transfer; unique design prevents opening during cycling and incubation DNase, RNase, and endotoxin free Re-sealable plastic bags packed in individual boxes keeping them easily stored Temperature range: stable from -20℃ to 100℃ Universal fits for the PCR instrument; withstand centrifugation of 6,000 RCF in a fully supported rotor