Stens 125-784 Fuel Cap for Echo Replaces: Echo: 13100455530 Fits models: Echo: GT and SRM trimmers/brush cutters, PAS systems, PE power edger's, BRD bed refiners, PB power blowers, ES shredders, HC, SHC, HCR and HCA hedge trimmers Ethanol: not compatible with greater than 10% ethanol fuel