Fuel Cap / Echo 13100455530Pack Size:1Echo 13100455530NHC 207-7384, Ratio Parts 176-609, Rotary 13530Echo GT and SRM trimmers/brushcutters, PAS systems, PE power edgers, BRD bed refiners, PB powerblowers, ES shredders, HC, SHC, HCR and HCA hedge trimmers, PPF, PPFD, PPSR, PPT and SRSpower pruners, ED, EDR, EA and TC engine drills, earth and ice augers and tillersOD: 1 7/8 "