📢 Maintenance Announcement: Our facility will be closed for annual maintenance from June 29th to July 7th. Any orders placed after June 25th will ship out on July 8th - 10th. We apologize for any inconvenience.
📢 Maintenance Announcement: Our facility will be closed for annual maintenance from June 29th to July 7th. Any orders placed after June 25th will ship out on July 8th - 10th. We apologize for any inconvenience.
Cart 0

About Us

Mason Box - an International Packaging Company - is your complete source for all your mailing box needs. We stock several styles of mailing boxes including the MailMaster mailing box, Universal Sealing Flap Box, Extra-Strength Utility Box, Econochip Utility Box and Medical/Lab boxes.

Our business hours are Monday to Friday 9am - 5pm EST

For all on-line orders, Masonbox.com offers:


Shipping within 48 to 72 business hours
The highest quality
The lowest prices…Why Pay More!

Mailing Boxes: 

MailMaster Mailing Box: Features rounded reusable wire fasteners, and is ideal for Parcel Post, UPS, & Federal Express. No taping is required.

Universal Sealing Flap Box:
 Features four sealing flaps on the bottom for secure mailing. Eliminates wrapping, tying and taping. Tamper evident protection and meet U.S. Postal Service regulations for Registered Mail.

Extra-Strength Utility Boxes: Sturdy .044 gauge cardboard for extra strength and rigidity. Telescoping two-piece construction with thumb cuts for easy opening.

Econochip Utility Boxes: Ideal for storage or inner shipping cartons. Made with super-strength cardboard and reinforced-taped corners

Medical/Lab Boxes:

Medical Vial Mailing Boxes: Specially designed for safe secure transit of standard size medical vials.

Paraffin Block Storage Boxes: Sturdy low-cost corrugated construction protects tissue blocks and organizes specimens.