Soap Noodles are perfect choice for standard laboratory applications. These beads can also be used in conjunction with smaller zirconium & silica beads to provide mixed matrix disruption tubes. These beads are more economical that zirconium silicates and oxides, They are basically designed for use in protein pull-down experiments to identify and characterize lipid binding proteins. Moreover, these Acid Beads are good for general grinding applications, as it has greater density and therefore higher impact power.