6″ Mailbox Post Height Extender Smart Checkout - No PO Box Gen-3 M series keys are

Gen-3 M series keys are to be used with Mail Boss mailboxes that have wafer disc locks and manufactured in 2023 or later

and a durable

The post bolts directly to the baseplate using six included stainless steel fasteners

Constructed from heavy-duty galvanized steel and finished with a durable powder coat

6″ Mailbox Post Height Extender Smart Checkout - No PO Box Gen-3 M series keys areEasily raise the installation height of your Mail Boss steel mailbox post with our Post Height Extender. The mailbox post height extension will securely lift the height of your mailbox by six inches and includes installation hardware. The Mail Boss Post Height Extender is available in our most popular colors to complement your existing post and includes installation hardware. The mounting pattern accommodates all locking security curbside mailboxes