Quick Deployment: These window coverings can be rapidly deployed in 0.6 seconds on classroom doors to conceal the interior during emergency situations. Simple Operation: Just pull the red tab to deploy the covering over the window, as demonstrated in the instructional image. Versatile Design: Suitable for various door styles and window sizes, providing adaptable protection. MADE IN USA - Each blind is custom manufactured in North Carolina - all size windows and doors. If you have a wider window than 48", additional tabs will be added. Durable Construction: Crafted from ballistic nylon to withstand repeated use and ensure reliable performance. Ensure your classroom or office is prepared for emergencies with these ballastic nylon coverings. Designed and manufactured in the USA, these custom size coverings feature a simple pull-tab system that allows the blind to deploy in 0.6 seconds during an emergency situation. The black panels provide complete privacy, while the red tab stands out for easy identification. Made from durable ballistic nylon, these coverings are built to last, compliant with NFPA701 Fire Retardant certification. With clear instructions printed on the covering, anyone can operate them with ease. To find your size, just measure the window glass size and add 4" to height and width. Example: a 4" x 26" glass would require a 8" x 30" blind size.