12" Yellow Pull-Tight Seals. One time use tamper evident pull-tight adjustable security seals. Allows the user to cinch-up the seal according to their specific size requirements. A heavy-duty, adjustable security seal designed for use on transportation and storage equipment or anywhere a multi-locking, tamper evident pull-tight security device is needed. Ideal for situations requiring varying seal lengths. Heavy-duty, all plastic, one-piece construction. Tamper-resistant acetal locking mechanism. Weather resistant; withstands extremes of cold and heat. Consecutively numbered. Matted in strips of 10 for ease-of-use.