Item#C3020 Double Buret Clamp holds two burets from micro to 100ml size, pipettes, or thermometers. Constructed of chrome plated, zinc-aluminum alloy for durability, the unit is simple to operate -- compress the scissor-like mechanism, insert buret, pipette, or thermometer, and release. Numbers and graduations on burets are easy to read. Attach easily to support rods with a convenient hook clamp. Knob for tightening is on the front for easy access.