Bioland HPLC Non-Sterile PTFE (hydrophobic) Syringe Filters 4mm 0.22um Laboratory Supplies. High Particle Retention: Particle retention rate exceeds 99% for superior filtration quality. Wide Material Selection: Available in Nylon, PVDF, PTFE, MCE, CA, PP, and PES membranes. Strong Chemical Compatibility: PTFE offers strongest compatibility, suitable for almost all solvents. High Flux Design: Threaded interface and optional glass fiber pre-filter ensure fast speed. Batch Consistency: Produced in clean workshop ensuring consistent quality between batches. OEM Support Available: Full customization, minor customization, and design-based options offered. Versatile Applications: Ideal for HPLC, GC, food industry, environmental water, and air purification. ISO 9001 Certified: Manufacturer holds ISO9001:2015 certification for quality management.