The Versatile Holder, used with thermometers and tubes, is designed to be clipped on the lip of a beaker or other vessel. The Holder is made from heat resistant materials that will withstand temperatures up to 120?elcius The Holder is suitable for the following sizes of thermometers and tubes. – Thermometers or rods: Up to 7mm in outer diameter – Tubes: Up to 10mm in outer diameter The Versatile Holder is very easy to attach to almost any container because of the clip-on design. And stable enough to secure students’ safety while performing experiments. The Versatile Holder provides a solution to safely performed experiments.