You will receive (2) packs of cresci products Window Wedge adjustable window stops containing (4) total window stops in white. About Window Wedge: The "Window Wedge". The adjustable window stop. Window Wedge is suggested for window gaps up to 1/4" and may not work on windows that have loose fitting pop forward sills for cleaning. <p> What is the Window Wedge? The Window Wedge was designed and tested to act as an adjustable window stop for double hung and horizontal sliding windows. The Window Wedge is made of durable, impact resistant, abs plastic and has a tapered groove on the bottom that holds a strip of (Velcro brand) hook material that mates with an 8 inch strip of (Velcro brand) peel and stick loop material. The loop material easily attaches to the window frame (see directions) without the use of tools. <p> The Window Wedge is then placed over the loop strip and pressed down at the desired window opening location. Note: For child safety, maximum window opening should not exceed 4 inches. For a quick reference, the Window Wedge package is 4 inches wide as shown in the installation drawing. <p> Benefits: Durable abs plastic. Easy hook & loop installation no tools, no screws, no nails, no damage. Added child safety set Window Wedge to a safe opening. (No wider than 4 inches). Added home security helps deter unlawful entry from outsiders. Let fresh air in and rest better. Multiple window settings adjust Window Wedge on loop strip for desired opening.