FEATURES: Easy labelling on frosted flat cap Tranditional separate cap decrease operating time Thin Walled tube for best heat transfer Made of USP VI Polypropylene Free of DNase, RNase, DNA, PCR Inhibitor, ATP, Endotoxin. All products are ready to use in PCR Autoclavable Evaporation rate below 5%, no mineral oil needed Fit almost all thermal cycler Small package can avoid contamination by different researcher All items contain tubes and caps