Protein Safe 1.5ml Tube, PP, 1.5ml, Clear, RCT Rating 30,000 x g, Sterile Reference: PLC65016 The surface of common plastic tubes can cause protein adsorption, resulting in fatal losses, which can affect experimental results. Protein Safe, made from a special polymer, prevent loss of protein in solution by minimizing adsorption on inner surface of tubes. Thus, it shows excellent recovery even with extremely low concentration protein samples.