Biomed Scientific Syringe Filters PTFE 13mm Diameter 0.45um Pore Size Non Sterile Pack 0.22um Pore Size 13mm Disc Diameter, HPLC and GC Needle Filter, Chrom Tech, Inc. Nylon,0.45um,30mm,100/pk. Picture of F30-NY045 – Syringe Filter, Nylon,0.45um,30mm,