You are looking at a brand NEW air cleaner riser ring spacer!- 1" (25mm) tall - suits 5-1/8" carburetorRaises the air cleaner assembly for an increase in air velocity for added power. Also provides more clearance for electric chokes, linkages and fuel lines.Thanks for looking and don't forget to check out all of our Restoration Essentials in our store. Your parcel will have a unique tracking number which will be sent to you via email on dispatch so you can keep an eye on your delivery.