We encourage you to purchase several and place them at various points along all exit routes. Constructed of durable rigid plastic, and manufactured in the UK by Jalite. Solid green background imprinted in white. Finished with a photoluminescent, glow-in-the-dark coating to ensure high visibility even in low light. Your choice of three size options. Affixes easily with any standard adhesive such as double-sided tape, sticky pads or ‘No-nails’.