1. Stable Without Shaking, Not Easy To Break, Easy To Install 2. The Letters L And R On The Frame Distinguish The Left Eye (L) And The Right Eye (R) And Are Synchronized With The Prescription. 3. Can Be Installed In Seconds. 4. Improve Stability And Prevent It From Falling Off Easily. 5. Applicable To Single Frame, Only The Frame, Not Including Lenses Product Name:Single Frame for Frame Function:Stable And Not Rocking, Not Easy To Break, Easy To Install Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use. Colour:As Shown Material:ABS Package Contents: 2 * Frame(frame only, lenses not included) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.