Syringe Filters. NEST Scientific USA. Nest syringe filters have pore size either 0.22μm or 0.45μm, and diameter 13mm or 25mm, with membrane materials either with PES or PVDF membranes. For sample volumes of 2mL to 100mL Retention volume <115µL Maximum operating temperature: 100°C autoclave at 125°C. Related Products: 25mm Syringe Filter.