P.O. Box Products


Use LocBloc to Protect Your Box Rent Revenue!

Click on photo to enlarge


Style A

For use in box sizes 1,2, & 3 with key lock assemblies as above.

Style B

For use in box sizes 1 & 2 with key lock assemblies as above.




To Save Time:
LocBloc is easily inserted onto lock assembly. No more taping backside of P.O. Boxes.
No more cardboard inserts.
During the 10-day period, mail can still be placed in boxes - no need to store the mail elsewhere.

Many Post Offices refer to LocBloc as the "Final Notice"

When LocBloc is placed in the box on the first of each month, the box cannot be opened by the patron.

LocBloc is a custom-designed block to prohibit the opening of a P.O. Box after the rent period has expired. LocBloc is constructed of high-impact plastic.

Fully warranted against mechanical and material defects or workmanship. We guarantee your complete satisfaction.

Flex Bloc

The Alternative to the Cardboard Block for Unrented P.O. Boxes

  • Advantages:
  • Outlasts cardboard inserts
  • Made of durable white plastic
  • Will not fall out from air current or door closing
  • Flexible - easily bends for installation
  • May be used for temporary forward



LocBloc, Inc.
Postal Products
PO Box 827
Flint, TX 75762

Contact Us
Toll Free: 1-800-297-1137

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