CARBURETOR PRIMER BULB REPLACES WALBRO 188-12SPECIFICATIONS:OD: 3/4" HEIGHT: 1/2" FITS:WALBRO WA, WT, WY, WYJ, WYK, WYL, WYP AND WZ CARBURETORS THAT REQUIRE A 3/4" OD X 9/16" HT PRIMER BULBREPLACES OEM:12318140630, 1201, UP04802, 505306701, 225834-00, 175181510, 12318109560, 12318140630, 188121, 20036-81670, 6820681430, 7002981480, 4133 121 2700, 188-12, 188-12-1, 188-14, 188-14-1REPLACES AFTERMARKET:615-740, 151-136, 203-5421, 203-5760, 49-020, 49-612, 504-00614, 5205032, 55-117, 7-02385, 9478, JT-5740, W188-12, WAL-188-12Warning:Lead-Nickel-Cancer and Reproductive Harm