MailWrap Adapter Kit for Plastic Mailboxes SD-AK950
Use with Plastic Boxes
Just peel off the self-adhesive backing to attach the specially developed "magnetic receiver strips" to each side of a plastic or aluminum mailbox. MailWraps® magnetic mailbox covers then attach just as if your mailbox was made of steel!
Also helps to add Double Sticky Velcro to the top of your mail box for a secure hold.