10-Inch x 21-Inch - 37-Inch Louver Metal Rail Extension.The Window screen extends from 21-Inch to 37-Inch. Painted metal rails and varnished wood ends. Extra sturdy, tenoned corners that keep screens square.Comes with zinc-plated nails.

• Plated easy-gliding steel rails for fingertip adjustment
• Varnished wood ends and coated steel screening
• Expands easily to fit your window
• Louvered panels let fresh, healthy air in - keeps rain, snow and wind out

• Window Screen Extends From 21-Inch To 37-Inch