Tubing Holder for Beakers; Tubing up to ⅜ in., Polypropylene (Pack of 6)This polypropylene plastic clip holds flexible tubing steady and fits securely onto the edge of beakers or pitchers up to ¼" thick.5.1cm (2") long arm has a hole to accept tubing up to 9.5mm (⅜") O.D.Autoclavable..