Spurcycle bells create powerful, enduring sound. Give notice well in advance with a loud, convincing tone. Precision built in the USA for a lifetime of way clearing. A compact nickel alloy bell, coupled with a uniquely engineered hammer, produces a remarkably loud ring. Fits any handlebar: Included large and small attachment bands provide multiple mounting positions, allowing installation on standard 22.2mm, oversized 31.8mm bars, and 35mm headset spacers. Impeccable build quality: Each bell is skillfully constructed in the USA from stainless steel and brass components designed to last. Material: premium brass and stainless steel Finish: Raw  Dome size: 30mm x 20.5mm  Weight: 45g Origin: Made in USA, Guaranteed for Life Install: 2.5mm hex tool required