Bioland HPLC Non-Sterile PTFE (Hydrophilic) Syringe Filters 4mm 0.22um Laboratory Supplies. High Filtration Efficiency: Particle retention rate exceeds 99% ensuring first-class filtration effect. Wide Material Selection: Available in Nylon, PVDF, PTFE, MCE, CA, PP, and PES for various applications. Strong Chemical Compatibility: PTFE offers the strongest chemical resistance, suitable for almost universal use. High Flux Design: Threaded interface and optional glass fiber pre-filter ensure fast filtration speed. Consistent Quality: Produced in clean workshop ensuring high consistency between batches. Versatile Applications: Ideal for HPLC, GC, food industry, environmental water, and air purification. OEM Support Available: Full customization, minor customization, and flexible customization options provided. ISO 9001 Certified: Manufacturer holds ISO9001:2015 certification for quality management.