This product is legal in California only for racing vehicles which may never be used, registered or licensed for use upon a highway.
Yost Performance Idle Mix Screw For Harley CV Carburetors
No more stopping to test and tune. Yost’s idle mix screw has a nice, large knurled rim that lets you adjust on the fly. It’s slotted too, so if you want to use a screwdriver on it, that’s also an option.
Features:

Includes necessary O-ring, washer, and screw

Made in the USA