PTFE membrane syringe filters, hydrophobic, chemically resistant for clarification of organic solutions. Recommended: Aggressive solvents, Strong Acids, Bases, Alcohols, Aromatics. Not Recommended: Aqueous samples. 13mm 0.22um PTFE with Luer lock (Colour Coded: Purple) 100/pk. SPECIAL PRICE ONLY ONE AVAILABLE WHILST STOCKS LAST!!