mfr: NPC, THE DOC-BOX CO. THE DOC-BOX¨ PROFESSIONAL POSTING SYSTEM The Doc-Box¨- an -all -in one posting system that protects plans, permits, inspection schedules and other required notices on the job site....job after job!It will last for years. It is designed by a builder for builders. Durable construction takes severe abuse, keeps permits, plans, clean and in place, satisfies most developers and community signage limits, generous space for you company name, reduces loss of copyrighted plans and documents, displays required license numbers and lot information, provides a professional sign-off station for inspectors, displays a warning to vandals and trespassers, available with or with out window or lock, recommended by inspection departments. Made of durable HDPE,21" x 24" x 4" in size. Locks (optional) Cam locks, steel body, 2 keys per unit keyed alike. Predrilled unit easily mounts on post or wall, includes Mounting screws and push pins. Package Shipping Size 22.12 x 23.75 x 28.00 (not product dimensions)