Halo symbolizes a new approach built on over 10 years of experience and growth making high end motorcycle parts. Halo is part philosophy and part technology, a synergy of the two infused together to create the most advanced and beautifully designed jewels for your bike.; Lower surface area than stock fuel cap system 30% weight reduction versus OEM Self-contained venting system with no hoses Clean lines to match modern sport bikes Includes fuel cap only, fuel cap base sold separately