Reversed-Phase Analytical HPLC Column, Acclaim 120, PolarAdvantage2, 3um Analytical(2.1 x 100mm). Column Type: Reversed-Phase, for Use With, LC/MS, Diameter: 2.1mm, Particle Size: 3um, Temperature: less than 60Degree celsius, Pore Size: 120A, pH: 1.5 - 10, Stationary Phase: Acclaim PA2.