A Polish customer ordered 10 bags of syringe filters from our company. He selected a 0.22 micron pore size, a diameter of 13 mm, and a PTFE membrane. In addition to the syringe filters we have a variety of membrane materials, 0.45μm aperture, and 25/33mm profile diameter. This filter housing material is made of high quality sanitary grade polypropylene material, which is resistant to pressure and is not easy to burst. The filter quality is stable. If you are currently interested in syringe filters, take a look at our products to ensure that you won't be disappointed.