With hundreds of mailing tubes available and ready to ship, we are certain we have the mailing tube you need. All round tubes, from the most economical crimped-end to the heavy duty end capped, are reusable and recyclable. Round tubes are available up to 8 inches in diameter and 48 inches in length and sold by the case. Also available are colored mailing tubes in 6 glossy colors. Square tubes are offered here in sizes up to 5"x5"x48" and triangular tubes up to 3" wide and 36 ¼" long. Both square and triangular tubes are shipped and stored flat to save on space. Telescopic tubes expand to accommodate different content lengths.