0.2 ml 8-Strip PCR Tube with Individually Attached Caps are reinforced to resist bending while handling. Individually attached domed caps are are easy to handle, and help avoid cross-contamination. Polypropylene thin wall tubes provide rapid, even heat transfer for reliable amplifications. Manufactured in clean room conditions and certified free of detectable levels of DNase, RNase, DNA, and PCR inhibitors. Tested pyrogen-free and non-autofluorescent. Made in the USA.