This non-sterile 20mL PYREX® VISTA™ test tube is well annealed, resistant to heat, and chemically stable. Cylindrical tube measures 16mm x 150mm and has a blue marking spot. Round bottom style with a beaded rim that is fire-polished. Non-Sterile. Reusable. Not Self Standing. Material: Borosilicate Glass Code 7740. Capacity: 20mL. Tube Style: Test. Tube Shape: Cylindrical. Bottom Style: Round. Top Style: Beaded Rim. Graduations: No. Cap Style: No Cap. Stopper Style: No Stopper. Outer Diameter: 16mm. Length: 150mm. Corning® #: 70800-16.