Avon Chrome Velvet Air Grips with Throttle Boss for 2008 & Newer TBW Harley-Davidson Touring models - AIR-93-BOSS-FLY Chrome Avon Velvet Air Cushioned Grips with Throttle Boss feature an incredibly soft, vibration damping rubber grip. Uses the same air cushion design as Avons original Air Cushioned grips. Throttle Boss end allows you to rest your hand on it to hold the throttle open. Grips have Chrome Billet End Caps and Trim Rings. Made in USA Fits 2008 and Newer Harley-Davidson Electra Glide, Ultra Classic, Street Glide, Road Glide and Road King models, 2016 and Newer Softail models with handlebars that use Throttle by Wire