Advanced Organizing Systems (AOS) MailStor cardboard mailing tubes are economical and easy to use. Constructed of durable, attractive white corrugated cardboard with deep gray lettering. Designed for quick assembly with self-locking closure. Stackable with label area on end for easy identification. Designed for easy document removal. Lightweight to save mailing costs. Economical alternative for storing and mailing anything that can be rolled, including charts, maps, blueprints, drawings, posters. Six sizes from 25" to 43" long. 25 tubes per pack; shipped flat. Quality-made in the USA.