PCR Tube 0.2 ml 8-Strip Flat cap clear Biologix 60-0088 125 Strip Caps/Pack , 1000 pcs Characteristic: 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, while flat caps are ideal for Real-Time PCR(qPCR); unique design prevents opening during cycling and incubation DNase, RNase, and endotoxin free Re-sealable plastic bags packed in individual boxeskeeping them contamination-free and easily stored Temperature range: stable from -20C to 100C Universal fits for the PCR instrument; withstand centrifugation of 6,000 RCF in a fully supported rotor