Refurbished ESA 582 pump. Micro-volume double plunger (approximately 10 microliters/stroke). Constant flow or constant pressure solvent delivery. Flow Rate: 0.001 - 5 mL/minute (10 - 340 bar); 5.001 - 9/999 mL/minute (10 - 200 bar) Please contact us for complete ESA HPLC solvent delivery system and warranty details.