9 FREE sample pack available. Contact your Restek sales representative today. 10 LOW, LOW PRICES. Very affordable for high-throughput users with quantity break pricing. Top 10 Reasons to Use Restek Syringe Filters Group of Substance & Chemical Reagents Cellulose Acetate Nylon PES PTFE PVDF ACIDS Acetic, 5% L R R R R Acetic, 10% L R R R R Acetic