PerkinElmer's Brownlee™ Columns provide a wide range of options for HPLC analysis. Brownlee Columns feature: Over 25 years of manufacturing experience dating back to Bob Brownlee's introduction of the first finger - tight cartridge system. Multiple phases, sorbents and support types to meet your most stringent requirements ISO-9001 certified process to ensure highest quality. Choose from the Brownlee Conventional, Microbore, MPLC, NewGuard, Peco/Fast LC, VeloSep or CHOICE columns listed below.