This gasket seals one throat of a DCOE (40 or 45 size*) to the intake manifold. Sold individually; two gaskets required per carburetor.
Two of these gaskets are included in the 40/45 DCOE Standard Rebuild Kit, Part No. 92.1047.05.
* The inside diameter of this gasket is the appropriate size for 40/45 DCOE throats. You can open them up to fit the 48mm throat of the 48 DCO if desired.