Almost anything can be made once but making a packing material reproducible, year to year, over 25 years, demonstrates true manufacturing and QC capability. Many companies claim to have columns with "µBondapak C18"-like selectivity but not one has ever passed Waters' stringent QC batch test. Waters set the standard for reproducible, high-performance chromatographic columns. Waters µBondapak columns are still the most widely-referenced and requested columns in the world.