50PCS Sterile PES Syringe Filter ,Diameter:25mm/33mm, 0.22um pore size can fast sterilization of buffers, culture media or other solutions. Sterile syringe filters are made with PES membrane filters with polypropylene (PP) housing, using the most advanced methods and design features. The PES syringe filters with GF pre-filter has excellent dirt-holding capacity, which makes a syringe filter a much larger throughput for some "hard to filter" sample. The filter layer is polyether sulfone (PES) microporous membrane, with natural hydrophilic properties, good water wettability, asymmetry, so it has high flow, low precipitates, low protein adsorption and other characteristics, can meet the widely used in buffer, protein, medium, additives etc. needle syringe filters are pre-factory tested for pore size, flux, precipitation, and gamma radiation sterilization. Needle Syringe filters are broadly used in life science laboratories for sterilization of small volume samples, such as protein, culture medium, additives, buffers, reagents, and drugs. Color: As Shown Material: plastic Package Contents: 50pcs x membrane solutions water filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.