This insert is made specifically for horizontal sliding windows, creating a clean, integrated way to add a pet door without cutting into your home. It sits within the track, allowing your window to retain its original structure and appearance. Quick Setup No CommitmentThe spring-loaded design uses pressure within the track to hold the panel in place, allowing for fast installation and easy removal. This makes it a practical option for renters or anyone who wants flexibility without permanent changes. The clear safety glass allows natural light to enter while helping reduce energy loss. Combined with the magnetic-sealing flap, this setup helps limit drafts and maintain a more stable indoor temperature. Built for Everyday UseThe aluminum and vinyl frame options provide long-term durability, while the weather-resistant flap is designed to handle repeated use. This creates a dependable access point your cat can use throughout the day. The adjustable panel height allows the insert to fit a range of window sizes, and custom options are available for more unique setups. For higher windows, adding a step or ramp can help make entry easier for your cat.