OEM Primer Bulb Kit / Walbro 188-508Pack Size:1Walbro 188-508, Walbro 188-508-1Laser 48140, NHC 203-5460, Oregon 55-188, Prime Line W188-508, Rotary 10393, Sunbelt WAL-188-508Walbro HDA-97 carburetorsOD: 1 ", Height: 1 1/2 ", Ethanol: Not compatible with greater than 10% ethanol fuel