Acrodisc® Syringe Filters, 4 mm, Pall Laboratory. Supplier: Pall Laboratory. These syringe filters are ideal for filtration of gas and organic solvents. Polypropylene housing. HPLC certified. The polypropylene housing is fitted with female Luer-lock inlet and male slip Luer outlet. The hydrophobic PTFE membrane, on a polypropylene support, has