The XR-ODS III column has a 1.6 micron particle size which is ideal for high-speed, high-resolution separations at pressures up to 100 MPa (14,500 psi). Silica particles of uniform size distribution result in rugged column performance, providing excellent peak shapes, durability, and longevity. Each column includes a performance report and physical properties certificate. USP L1, 75A pore size, 21% carbon load, fully endcapped with a pH range from 2-7.5. Maximum operating temperature 80C. A guard column is not available, so an UltraShield pre-column filter is recommended. Use 220-91539-01 for a single filter, 220-91539-03 for a 3/pk, or 220-91539-10 for a 10/pk.