OEM Primer Bulb Kit / Walbro 188-511Pack Size:1Walbro 188-511, Walbro 188-511-1Laser 48142, NHC 203-5468, Oregon 55-190, Prime Line W188-511, Rotary 10395, Sunbelt WAL-188-511Walbro WA-140 carburetorsOD: 7/8 ", Height: 1 3/8 ", Ethanol: Not compatible with greater than 10% ethanol fuel, External mount