Poweka New Pack of 10 Carburetor Primer Bulb for Honda FG100 GX22 GX31 Little Wonder Mantis Tiller New high quality replacement carburetor primer bulb Fits for Honda 4 Cycle Engine FG100 GX22 GX31 Bulb height: 0. 55(14mm) Bulb flange diameter: 0.75(19mm) Bulb diameter: 0.625(16mm)