This is a Fingertip Prop or spinner back plate Balancer.INCLUDESTwo Blue anodized cones (aluminum)One Zinc coated steel shaftSPECIFICATIONSSteel shaft: 5/32" w/32 threads per inch.Cones: Inner dia: 3/8"Total Length: 2-3/8"Outer Diameter: 15/32"Thickness: 7/8
minicars