PYREX® 9mL Rimless Wasserman Culture Tubes offer greater convenience in plugging and rack storage. Walls and bottoms are of uniform thickness. Rimless ends are fire-polished. Tubes have white marking spot. Material: Borosilicate Glass Code 7740. Style: Culture Tube. Surface Treatment: Not Treated. Capacity: 9mL. Length: 100mm (Approx). Outer Diameter: 13mm (Approx). 72/Pack. 720/Case. Corning #: 9820-13.