These are the original, high quality W.B. Marvin screens. Plated easy-gliding steel rails for fingertip adjustment, wood ends and coated aluminum screening. Multi color17 pound weightFingertip adjustment to fit all sash windowsCoated metal screen resists tear, weather and keeps flying bugs outDurable construction painted metal rails and varnished wood endsExtra sturdy tenoned corners double nailed keep screens square10 x 25 - 45 inch size