BFSeals Pull Tight Seals. One-time use tamper evident pull-tight adjustable eco-plastic security seals. Allows the user to cinch-up the seal according to their specific size requirements. A medium-duty, adjustable security seal designed to be used on any equipment requiring a highly tamper-resistant locking mechanism and reasonable degree of strength. Manufactured out of high density polyethylene and acetyl (HDPA). Durable, all ECO-plastic, one-piece construction. Patented, tamper-resistant nylon locking mechanism. Thin, yet strong sealing strap designed to fit most locking rings and equipment latches. Consecutively numbered.