A Fisher clamp made of polypropylene (PP) is a laboratory tool used for holding and securing laboratory glassware. The clamp consists of a long stem and a jaw that can be tightened to grip the glassware securely. Fisher clamps are commonly used in laboratory settings for holding flasks, test tubes, and other glassware in place during heating, mixing, and other laboratory procedures.

The use of a PP material makes the Fisher clamp durable, lightweight, and resistant to chemicals commonly used in the laboratory. Additionally, polypropylene is chemically resistant and can be used with a wide range of laboratory materials without risk of contamination or corrosion.