2 Pack Primer Bulb (Compatible With Up To 25% Ethanol) Replaces Zama 0057004 0057003, Echo 12538108660, Homelite 561635001 2 Quality Aftermarket Primer Bulbs manufactured to be compatible with up to 25% ethanol in fuel Better than OEM that are not compatible with ethanol fuel Replaces Zama 0057004 or 0057003 Replaces Echo part number 12538108660 Replaces Homelite part number 561635001