3 DIAx18-1/4" - TRI8 Triangular Mailer Boxes - 50/Bundle

Self-Locking Triangler Tube Mailing Boxes - 32 ECT #3 white outside, brown inside. Ideal for mailing rolled material such as Blue Prints, Posters, Calendars or Charts. Self-locking ends provide easy opening and closing. Furnished flat. All dimensions are inside dimensions.