Prime-Line Products PL 7725 Screen Frame Corner, 7/16-Inch by 3/4-Inch, Bronze Plastic,(Pack of 4) 3/4" x 7/16" Plated Slotted Steel Strapping Nylon Screen Frame Corners Plastic corners ae used to assemble 7/16 thick window screen frames Square-cut installation for fast and easy construction Bronze Vinyl Durable Plastic Material