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• Each tube is accurately calibrated to help quickly determine surface tension by the drop count method
• Each tube is graduated above and below the bulb
• The 2.5 and 5.0mL sizes allow flexibility in sample size of most liquid baths, while the 3.5mL size is used for more viscous applications
• Available individually or in a complete set of 3 tubes (1 of each size) in a protective case
• All tubes supplied with instructions for use