Primer Bulb / Zama 0057004Pack Size:1Echo 12538108660, Shindaiwa 12538-108660, Stihl 4226 121 2700, Zama 0057003, Zama 0057004Dealer Choice 33-1301, J. Thomas PE-341, Laser 48157, NHC 203-5892, Oregon 49-028, Prime Line 7-02380, Rotary 9948, Sunbelt SB-90924, Sunbelt 0057003, Sunbelt B10057003Echo most C1M, C1Q and C1U Zama carburetors; Zama C1U and C1Q/M carburetorsOD: 13/16 ", Height: 5/8 ", Ethanol: Not compatible with greater than 10% ethanol fuel