Prime-Line Products PL 7728 Screen Frame Corner, 5/16-Inch by 3/4-Inch, Bronze Plastic,(Pack of 4) 3/4" x 5/16" This product is manufactured in China Nylon Screen Frame Corners Plastic corners are used to assemble 5/16in. thick window screen frames Square-cut installation for fast and easy construction Bronze Vinyl Durable Plastic Material