Incredibell Big Brass Bells are made of solid brass that offer a melodic sound that is full and old-fashioned. Dome Diameter: 51mm (2″) Fits handlebars with 21.7mm – 24mm (.86″ – .95″) outside diameters Model: Big Brass Brand: Incredibell QBP #: BE1085 Manufacturer Part Number: 20IBBC UPC: 764459311888 Imported