Avon Performance Grips AVG-AIR-90-AN-B-FL Air Cushion Handgrips w/Throttle Boss Black for Harley-Davidson Big Twin 08-24 w/Throttle-by-WireDescription for Air Cushion Handgrips with Throttle Boss Black. Fits H D 2008up with Throttle by Wire. Features & Benefits: Air ride for yours hands! Made with a special core bar that creates air pockets inside the grip body Air pockets dampen vibrations, eliminate the tingle in your hands and soften the overall feel of the ride Soft serrated texture helps you hold on with no slip confidence 6061 billet aluminum end caps and collars Includes throttle