HOOAI New Carburetor Primer Bulb for Honda FG100 GX22 GX31 Little Wonder Mantis Tiller (10pcs) 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) We are professional auto parts seller! Please feel free to contact us if you are not sure which part to order! We provide 90 days warranty for all items from us!