Avon Diamond Contour Smooth Grips For Harley With Dual Cable Throttle The Diamond Contour Grips build upon the legacy of the Custom Contour but receive the upgraded Air-SS system that incorporates a system of air pockets inside the grip to provide vibration damping so you can ride ...Avon Diamond Contour Smooth Grips For Harley With Dual Cable Throttle The Diamond Contour Grips build upon the legacy of the Custom Contour but receive the upgraded Air-SS system that incorporates a system of air pockets inside the grip to provide vibration damping so you can ride in comfort! Features: Great feel and ergonomic design Seamless rubber grip technology Billet end caps Made in USA Note: Chrome image for finish reference only - actually for dual cable throttle.