Bel-Art Scienceware 134910100, 36 Yards Length x 1" Width x 0.001" Thick, Clear Polyester Protective Lab Labeling Tape (Pack of 3)
Slip this thin triangular gauge into vessels and read the correct stopper size at the top of the neck. Two scales are provided, one for rubber or vinyl stoppers and one for cork stoppers. The reverse side of the gauge has a circular scale for sizing outside diameter of tubing between 4 and 52mm. Per each.
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