Features: Suction cup fixation: adopting a strong suction cup design, easy installation, no need for drilling, suitable for various smooth surfaces such as glass, tiles, etc. Multifunctional use: not only suitable for window, but also for various scenario such as door and cabinets, providing comprehensive security protections for families. Easy to operate: Adults can easily open, and the design take into account the convenience of adults, without affecting daily. Durability component: Quality plastic and silicone, wear-resistant and durability, ensuring long time effectiveness. Practicality: Suitable for various scenario such as home window and balcony door, preventing children from accidentally opening window and providing additional safety protections; No tool installation required, suction cup design is easy to disassemble and move at any time. Specifications: Component: plastic , silicone Parameters: Temperature resistance ranging -20℃ to 70℃, suction force ≥10kg Dimension: Large circle diameter 5.0cm /1.97inch(more detail size please refer to pictures) Color: White Package Includes: 1 Piece Child Safety Suction Cup Window Lock note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.