EasiPrep syringe filters provide 13mm & 25mm two sizes. They are ideal for sample preparation of UHPLC, HPLC, GC, etc. The color ring design makes Whatman SPARTAN HPLC Syringe Filter, RC, 13mm, 0.45 µm, 100 . Whatman SPARTAN Syringe Filters, made with regenerated cellulose, are used to filter organic and aqueous solutions in HPLC, 13 mm, 0.45 µm, 10463030,