Weber, signal barrel Carburetor. W-222051. For your air-cooled VW Beetle, Karmann Ghia, Bus. The two bottom mounting Studs are approx. 2 1/8"  apart center to center, so please check that will fit into your Manifold. It's been sitting on the shelf for many years, so best if you take apart, clean and replace gaskets before use. For Performance use.