This is a 1/2" phenolic carb insulator that fits the 36mm DCNF Weber and are sold individually to help prevent carburetor boiling or heat soak, the cooler it is the more power it makes.    Any questions please email at Dashman's Hot Rod & Speed Parts.

Includes free sticker with shipment!!

If you don't see it just ask, we probably have it, or will custom make it to your needs.