Material: Thicker Material, Not Afraid Of Strong Wind, High Hardness, Not Easy To Break, Integrated Body, Solid And Simple Structure, Anti-Rust, Anti-, Nondeformable, Polishing Processed , Top Grade Appearance, To Use. Function: Ideal For Fixed The Position Of The , Wind-Proof, To Control Window Open And Silent Holders. Installation: Screw Fixing Type, Consist Of Hook And Eye Closure Lock, Come With Matched Mounting Screws, Easy To Use. Type:Limit Wind Hook, For Holding Open A Window Colour:White Material:ABS+Stainless steel Package Contents: 5 * Wind Hook Kit 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.