Accutronix "Knurled Notched" Fly-by-Wire grips are machined from Solid 360 BRASS. They are shipped raw brass so they will patina over time like you want them to. These are the Fly-by-Wire, '08-'22 FLH (Touring Bikes) and '16-'22 FX and have a nylon throttle sleeve for smooth operation. These Accutronix Brass Grips are manufactured in Phoenix Arizona USA from solid 360 BRASS.