This is a sheet of twenty (20pcs) rectangle foam adhesive cushions. These were manufactured by GM for many different applications in the automotive industry. Normally used for sound deadening, and cushioning to quiet squeaks and rattles. Although these could be used for many different applications in the commercial, residential, industrial, manufacturing, automotive, and marine industries. Each square is 2mm thick with a sticky adhesive on the back side. Each square measures 75mm X 90mm. You will receive 20 squares per order.