Storage Vials are made from high quality polypropylene plastic. Each vial has a 5mL capacity measures 3.5 total length and is 0.5 in diameter. The includes screw cap has a built in leak-proof ring seal. Can be used for storage of biological material human and animal cells or any other small substances. Material Specifications: Physical Properties Translucent Rigid Microwavable Maximum Use Temperature: 135C Minimum Use Temperature: -20C Brittleness Temperature: 0C Specific Gravity: 0.90 Sterilization Autoclavable: Yes Gas: Yes Dry Heat: No Radiation (Gamma): No Disinfectant: Yes Chemical Resistance Acids (Dilute or Weak): Excellent Acids (Strong or Concentrated): Excellent Alcohols (Aliphalic): Excellent Aldehydes: Very Good Bases: Excellent Hydrocarbons (Aliphalic): Very Good Oxidizing Agents (Strong): Not recommended Permeability O2: 240 CO2: 800 N2: 48 Water Absorbtion: <0.2% Cytotoxic: No Eisco Labs proudly manufactures its own products using state-of-the-art equipment and following the highest standards of quality control. Each product is carefully designed by a team of laboratory professionals and experienced engineers with quality and durability in mind. They are manufactured with only the highest grade raw materials and according to international quality standards to ensure that they can withstand use in even the toughest laboratory environments.