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Yuanzan Single Channel Manual Pipette 2UL-1000UL Laboratory Liquid Handling OEM Manufacturer. High-Precision Calibration: Three-point manual calibration, error as low as 0.5%. 200,000-Press Durability: Smooth and reliable under frequent use. Light Pressing Force: Approx. 0.12 kg for easier operation. Smooth Tip Attachment: PVDF nozzle with approx. 0.66 kg attachment force. 1-Meter Drop Tested: Three consecutive drops while maintaining accuracy. 540-Hour UV Resistance: Resistant to discoloration and yellowing.