With five hole sizes ranging from 3.5mm to 14.5mm, this holder accommodates various thermometers including liquid in glass, electronic with probe, and bimetal with probe. The stainless steel, spring loaded clip attaches securely to laboratory containers, shelves up to 3/8” thick, and more. Rubber bumpers on the clip prevent scratching. Durable polyurethane foam provides a secure grip to keep thermometers in place.