The Metabo HPT - Hitachi 885443 Pumping Unit W/Flywheel helps generate and compress air in compatible EC2510E air compressor equipment. It uses the internal piston mechanism and flywheel to draw in and compress air for delivery to the compressor tank. A properly functioning pumping unit supports consistent air pressure and reliable compressor performance. Replacing a worn or damaged u... https://www.wholetoolbox.com/metabo-hpt-hitachi-885443-pumping-unit-w-flywheel-for-ec2510e/885443.html