itubes 15ml conical tubes rnase dnase free sterile foam racked

iTubes are the perfect tube choice for conducting multiple studies, or studies that require multiple sample types or solutions. iTubes are manufactured to our exacting standards, and include these important features: Made or premium polypropylene with uniformly thick walls for thickness and clarity Max RCF of 12,000xg (for 15mL tubes) and 15,000xg (for 50mL tubes) Safe to store at temperatures down to -80°C Sterilized with ethaline oxide Tubes and caps are certified for stem cell research Frosted writing area, and lid is super-flat and frosted for easy writing RNase, DNase, Pyrogen free iTubes come in convenient foam racks and are packed in cases of 500 tubes.