Easily comply with US Postal Service Regulation M033 which requires all letter and flat trays to be safely and securely strapped. This conveniently organized postal strapping kit contains everything you need. It includes a self-dispensing box with 1/2" x 3,000' plastic strapping, 190 plastic buckles (jumbo size for easier handling), a strap cutter/tensioner tool, and easy-to-follow instructions.