This polypropylene clip captures and holds flexible tubing firmly in place in beakers or other open containers. It fits snugly over the edge and has a 51mm (2") long arm with a hole to accept tubing up to 9.5mm (3/8") O.D. Holds tubing of 3/8" OD in place over edge of beakers or other open containers with a wall thickness of up to ¼ inch. Autoclavable.