Hafny Bar End Bike Mirror, Stainless Steel Lens, Safe Rearview Mirror Ideal for road bikes, mountain bikes, E-bikes, hybrid bikes, city bikes, and YOUR BIKE! Stainless steel lens Diameter 62mm - 100% safe and unbreakable, stainless steel is recyclable, and more eco-friendly than glass Fits inside handlebar within 17mm ~ 21mm (inside diameter) Adjustable 360, Applicable for both Left and Right Convex Surface for a Wider View. Made in Taiwan, Nylon + Fiber - Eco-friendly