FOR ALL BICYCLES: The bicycle bell is suitable for roadsters, children’s bikes, men’s bicycles and any other bicycle. Material: Alloy + plastic Size: High width 4 * 7 * 6cm length Color: Black, Gold, Blue, Red, Silver Fitment: suitable for installation handlebar diameter of about 22MM Compatible with: Compass aluminum bell applicable to folding bikes / mountain bike / road bike, etc. Package includes: 1 * Bicycle bells