Replacement Panels For Metal A-Frame Sandwich BoardsAre you looking for new or replacement panel inserts for your a frame sandwich board or do you need extra panels to add to an order? You're on the right page! Make sure you order two panels if you need a replacement for both sides of your a frame sign. Your replacement panels are printed on matte or reflective vinyl that is applied to 4mm thick corrugated plastic that holds up to the elements and slides perfectly into your sandwich board frame.