Mar 12, 2020 · 13,25,33. 0.22,0.45,0.8. Sterile. 100. At Aijiren, we have selected a range of syringe filters for most applications and are compatible with our 0.45um PP Syringe Filters. If there are any requirements about 0.45um PP Syringe Filters for HPLC testing, please contact Aijrien, a leading supplier of chromatographic consumables for 10 years.