Column HPLC Acclaim PolarAdvantage 3um Reversed-Phase analytical 2.1X50mm. For Use With LC/MS, Diameter 2.1mm, Packing Material UlTrapure Silica, Particle Shape Spherical, Particle Size 3um, Temperature less than 60degreeC, Pore Size 120A, pH 2 - 8, Pore Volume 1mL/g