Publication 2 - Packaging for Mailing - Postal Explorer - USPS.com

Bulk Mail Center Standards6-6.6.26-6.5.2 ClosingThe outer mailing container must be securely closed with tape, adhesive, orcompletely clinched staples. Paper tape must be of at least 60-pound basisweight kraft. The container must be reinforced at two points with reinforcedpaper or plastic tape, pressure-sensitive filament tape, or tight nonmetallicbanding. An otherwise properly closed box may be shrinkwrapped.6-6.6 Magnetic Tapes From 40 to 70 Pounds6-6.6.1 PackingA mailing of tapes weighing from 40 to 65 pounds must be packed in at leasta 200-pound test fiberboard box (or equivalent). A mailing weighing from65 to 70 pounds must be packed in at least a 275-pound test fiberboardbox (or equivalent). Multiple shells should be used for greater protection.6-6.6.2 ClosingThe outer mailing container must be securely closed with tape, adhesive, orcompletely clinched staples. Paper tape must be of at least 60-pound basisweight kraft. An otherwise properly closed box may be shrinkwrapped. Thecontainer must be reinforced at two points with reinforced paper or plastictape, pressure-sensitive filament tape, or tight nonmetallic banding.Publication 2, January 200233