Avon Memory Foam Grips For Harley With Dual Cable Throttle Avon Memory Foam Grips soft, durable, chemical resistant grip that is a true vibration dampening grip. Features: Ideal for style and comfort featuring the softest, most durable grip around Grips are a true vibration dampening grip Sizing: Small / 1.375 Dia. Medium / 1.5 Dia. Large / 1.625 Dia.