Carburetor enrichment knob for S&S Super "E", "G" & "B" carburetors. This kit makes adjustment a breeze. Features: This kit utilizes a brass retaining nut that allows you to keep the choke/enricher "ON" or "OFF" using a spring and stainless steel plunger. The knob measures .6" x .6" and features a knurled surface for added grip that makes it easy to use. This enricher ONLY works with S&S Super "E", "G" & "B"carburetors. Dimensions: Overall Length = 2-11/16" Width = .6" Thread = 7/16"-20 Finish: Chrome Knob Brass Fitment: S&S Super "E", "G" & "B" carburetors.