This universal mailbox flag kit is an essential accessory for anyone needing a reliable way to outgoing mail. Designed for easy replacement, it requires no tools and is perfect for outdoor use. The flag features a sturdy construction with a thickness of 1.2mm, ensuring durability and longevity. It can be effortlessly installed on various types of mailboxes, including post-mount, wall-mount, and brick mailboxes, thanks to its versatile horizontal and vertical mounting options. Simply peel the adhesive tape, stick the flag onto any smooth and hold for 10 seconds to secure it in place. When you have outgoing mail, just raise the flag to alert your mail carrier. This practical and user-friendly design makes it an indispensable addition to your mailbox setup, enhancing both functionality and convenience.