Primer Bulb / Walbro 188-12-1Pack Size:1Echo 12318140630, Homelite 01201, Homelite UP04802, Homelite UP04802, McCulloch 225834-00, Shindaiwa 20036-81670, Stihl 4133 121 2700, Walbro 188-12, Walbro 188-12-1, Walbro 188-14, Walbro 188-14-1Dealer Choice 33-1205, Foley/Belsaw 5980099, J. Thomas JT-5740, Laser 48015, Laser 40341, NHC 203-5421, NHC 203-5760, Oregon 49-020, Prime Line 7-02385, Ratio Parts 151-136, Rotary 9478, Sunbelt WAL-188-12Walbro WA, WT, WY, WYJ, WYK, WYL, WYP and WZ carburetors that require a 3/4" OD x 9/16" HT primerbulbOD: 3/4 ", Height: 1/2 ", Ethanol: Not compatible with greater than 10% ethanol fuel