12 pieces per package, designed for bikes with 22 mm handlebars 22 mm bicycle rearview mirror with 360degree rotating convex lens for a wide rear view Material: ABS for durability and light weight Design: streamlined, simple and generous styling with a sleek profile; lower wind resistance than bulkier mirrors and a more eyecatching look on mountain and road bikes Foldable function: foldable mirror arm to meet different needs and to save space when not in use Clear visibility: provides a reliable, clear rear view to help monitor traffic behind you Compatibility and performance: suitable for 22 mm handlebars on mountain and road bikes, offering stable, adjustable positioning for quick adjustments on the go Use scenarios: Urban commuting: keep an eye on traffic and cyclists behind you during lane changes Mountain/road rides: monitor rear traffic on winding roads and fast descents Parking and storage: fold the mirror to reduce space when riding through tight spaces or storing the bike in limited areas