GoSecure Security Seals Plain Round Blue (Pack of 500) IMSealBLUse these Plain Security Seals with your mailing pouch for tamper evident security when mailing cash and other sensitive items. They also use a design intended to prevent the build up of debris, just follow the easy four step application to secure your pouches. This pack contains 500 plain blue seals. Security seals for mailing cash and confidential documents Designed for use with mailing pouches For tamper evident mailing Simple four step application