Primer Bulb / Walbro 188-11-1Pack Size:1Walbro 188-11, Walbro 188-11-1Dealer Choice 33-1209, Foley/Belsaw 5980098, Laser 48143, NHC 203-5766, Oregon 49-026, Prime Line 7-02383, Ratio Parts 151-135, Rotary 9477, Sunbelt WAL-188-11Walbro WZ3-WZ22, WZ26-WZ33, WZ35, WZ38, WZ39 and WZ43 carburetorsOD: 3/4 ", Height: 3/8 ", Ethanol: Not compatible with greater than 10% ethanol fuel