For Weber 48mm IDA 48 MM IDF Carburetor Riser Phenolic Insulator Spacer 1/4"

This is a pair of 1/4" phenolic carb insulators that help prevent carburetor boiling or heat soak, the cooler it is the more power it makes. If you don't see it just ask, we probably have it, or might be able to custom make it to your needs.