For gas generators, it's an OEM standard huayi generator manual carburetor compatible with Honda GX390 GX340 powered generators and clones. The 27mm carb is w/ 30.5mm air intake and w/ 52mm center to center mounting holes.
The kit contains a generator carburetor, a fuel line hose with protective tubing, and an OEM standard support. The throttle spring kit is compatible with the carburetor. It is specifically designed for manual generator models, not automatic ones.
For HUAYI SKU P27-3D P27-1D, fits for Honda clone generators powered by GX340 GX390 13hp 15hp 339cc 389cc 420cc 459cc 439cc as OEM carburetor such as Generac 0J2451 GP5500 Predator 9000 Champion 7000 and many others etc.