The Granatelli 0.50" tall carburetor spacer is 5.125" in diameter and comes with an O‑ring seal to ensure a sealed interface between the spacer and carburetor or intake. It acts as a spacing component to change carb mounting height while maintaining a sealed junction. This 0.50" spacer suits 5.125" diameter carburetor bases and includes the O‑ring for sealing at the flange interface.
Granatelli 0.5in Tall 5.125in Diameter Carburetor Spacer w/O-Ring Seal