Designed with round bottoms to fit high speed rotors in refrigerated or non-refrigerated centrifuges. (Tubes must be filled to at least 80% capacity for proper function) Molding technique produces uniform wall thickness for increased strength Uniform diameter (no taper) for better rotor fit and force tolerance Longer-lasting than polycarbonate tubes under conditions of repeated autoclaving 50 and 100mL sizes available lipped for easier retrieval from rotor cavities › See more product details