Made of st. steel, with holes to accept clamps for a variety of Erlenmeyer flasks and test tube racks. The tray can easily be lifted into or out of the bath by its two handles which are above the waters' surface, for easy inserting and removing from the bath. Without clamps. Made of st. steel, with holes to accept clamps for a variety of Erlenmeyer flasks and test tube racks. The tray can easily be lifted into or out of the bath by its two handles which are above the waters' surface, for easy inserting and removing from the bath. Without clamps.