Adjustable Through The Wall Mail Slot Demo Review

How can I frame this 6 x 9 square hole in my wall? Thank you Some come as a set some you will have to purchase a mail slot wall sleeve

comshopjimthecarguy Mail slot sleeve 3O6ZeAI Used for hollow

slot24bet Usually ships in 3 to 5 business days Brand, European Home Mailbox Style, Modern Mount Type, Through-Wall Material, Stainless Steel Mailbox Type, Parts

bao zhu zhao fu slot machine rules sleeve clamping around a brick or if it is cemented in place I've never seen a mail slot like this, so I really have no idea how it goes