High quality float glass, graded according to the highest standards in the industry. Meets and often exceeds ASTM specification for Flat Glass C 1036-85.
Heat-treated steel tension springs hold window screens into sliding aluminum window screen channels. Slips into corner of 3/8" or 7/16" frame.
Holds aluminum frame screens into window frames. For frames 3/4" x 3/8" or 7/16".