Features: Simple installation, strong and enduring, effectively preventing children from accidentally opening door, window, and cabinets. Open the wing on both side to block movement of door and window. Make of clear Plastic and designs in a butterfly shape, it is safe to accompany you on both side. Reverse the operation of the wing to reset, without affecting the normal opening and closing of door and window. Clear and none scratch adhesive with strong adhesion, no need for drilling. Specifications: Component: Plastic Size: about 76x57mm/2.99x2.24inch Package Includes: 10Pcs Window Limiters note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.