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Premium Customizable HVAC Filter Cartridge for Superior Air Quality. Low Resistance Design: Thin thickness starting at 25mm with initial pressure under 200Pa for energy saving. Wide Application Scope: Suitable for FFU, cleanrooms, electronics, semiconductors, hospitals, and food industries. Full Customization Options: Supports OEM/ODM for size, material, function, logo, and packaging per customer specs. 30 Years Manufacturing Experience: ISO9001 and ISO14001 certified manufacturer with over 50 patented technologies. 100% Quality Inspection: Every filter undergoes scanning tests and visual/function inspection before shipment. Flexible Lead Time: Peak season: 1 month; Off-season: within 15 workdays.