GenScript supplies 2.5 ml endotoxin-free tubes with plain end made of research-grade glass. GenScript′s Endotoxin-free tubes can be applied to dilute or aliquot sample with an especial requirement of endotoxin level (< 0.005 EU/ml). <br><br>GenScript Endotoxin-free tubes are provided in encapsulation with pyrogen-free aluminum foil (folded into a package), which sufficiently inhibits the introduction of any contamination, such as RNase/DNase.