Are you still worried about light leakage around the edges of your curtains (such as gaps between the curtains and the wall or window frame) or at the track connections after installation? Our window edge blackout strips are perfect for any situation where you need to enhance light blocking, reduce light interference, or improve environmental comfort by sealing gaps (such as soundproofing or dustproofing).Specification:- Material: Aluminum- Length: Customizable- U Channel Internal Height: 3.81cm(1.5in)- U Channel Internal Width: 1.27cm(0.5in)- Tracks External Size: 2.5×4cm(1×1.57in)- Colors: Black, Gray, White- Installation: Drill holes for installationFeatures:---Enhanced light blocking and improved privacy, especially at night when streetlights, moonlight, or early morning sunlight may affect sleep quality. By blocking light penetration through gaps between curtains and window frames, walls, or at the bottom of curtain tracks, the interior remains darker.---Assist with soundproofing and thermal insulation. While the primary function of light-blocking strips is to block light, they also fill gaps between curtains, window frames, and walls, thereby reducing outdoor noise transmission into the room to some extent and providing mild soundproofing. Additionally, they prevent outdoor hot or cold air from entering through gaps, aiding in improving indoor thermal insulation and energy efficiency, and indirectly reducing air conditioning energy consumption.--- Dust and insect prevention: After sealing the gaps, the light-blocking strips also reduce the entry of outdoor dust and insects through the gaps, keeping the indoor environment cleaner and more hygienic. Package Includes:2* Light Blocking StripsNotes:- Please check if your windows are suitable before purchasing!- There may be an error of 1-3 cm due to manual measurement.- There may be chromatic aberration, Please refer to the actual product. 【Aluminium Light Blocker】Ours light blocking strips are made of aluminum alloy, whichminimizes light reflection, ensuring a total blackout effect.High-Density Soft Bristle Strips: Installed inside the track, these strips prevent wear and tear, maintaining the integrity and functionality of the light blockers. 【Customization U channel blocking strips】Available in 3 colors: black, white, and gray. Length can also be customized, but please note: For lengths exceeding 1.5 meters, we will default to cutting and shipping. If you do not require cutting, please contact us promptly after placing your order. 【Side Tracks for Blackout Shades】Our U-channel light-blocking strips seal gaps on both sides of curtains and blinds.Blocks intrusive light for darkness.Ideal for blackout curtains, cellular/honeycomb shades, roller blinds, Roman shades, and shutters. 【Drill Installation & Reusable】:Secure Screw Fixation (Reusable): For a permanent hold, use the included screws. The strips can be easily removed without causing any damage, making them reusable. 【Multi-scenario Applications】: Residential Spaces: Bedrooms, such as children's rooms, night shift workers, light-sensitive individuals, children's rooms, study rooms for activities like painting or reading, and studios; Commercial and Public Spaces: Meeting rooms, cinemas, hotel rooms, screening rooms, photography studios, darkrooms, where simulating nighttime conditions or controlling light intensity is required; Special Function Spaces: Laboratories such as optical laboratories, biological cultivation rooms; temperature- and humidity-controlled rooms such as precision instrument storage rooms, artifact storage rooms, and all environments requiring light blocking. Color Black Brand Name Generic Item Weight 2.2 Pounds Manufacturer XIEXINGBIANLI Included Components Eyelet Item Dimensions L x W 0.39 L x 0.39 W