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Wholesale New Design High Capacity Small OEM Rotary Three Lobe Roots Blower. Durable Cast Iron Material: Constructed from high-strength cast iron for long-lasting reliability. Low Noise Operation: Features synchronized rotors for steady gas movement with minimal noise. Wide Application Range: Suitable for wastewater treatment, aquaculture, and pneumatic conveying. Multiple Model Options: Available in 13 models ranging from QSR-50 to QSR-350 with varying power. ISO and RoHS Certified: Meets international safety and environmental standards with ISO and RoHS. Fast Standard Delivery: Standard models dispatched within 3 working days after payment. OEM and ODM Services: Full customization available from samples, designs, or minor adjustments.