10.55.00 Postal Specialties
10.55.23.16 Mail Box Directories
10.55.13 Central Mail Delivery Boxes 10.55.13.13 Cluster Box Units 10.55.16 Mail Collection Boxes 10.55.19 Receiving Boxes 10.55.23 Mail Boxes 10.55.23.13 Apartment Mail Boxes 10.55.23.16 Mail Box Directories 10.55.23.19 Mail Box Key Keepers 10.55.26 Parcel Lockers 10.55.33 Data Distribution Boxes 10.55.36 Package Depositories 10.55.91 Mail Chutes