Open this mailing tube to a surprise sound, song or speech for 10-seconds. The message tube is available in a solid color tube which delivers an unforgettable mailing. Each tube has space for literature, catalogs, or products. The top lid contains a clip to hold your business card. When the lid is opened, your custom 10-second message automatically plays. Other tube sizes available 6" to 24" with various diameters available, please ask your sales representative for more details. Clegg Patented Sound Tube Patent No. US 5,762,194.