Easily build, repair, and replace missing or damaged window screen frames with this Prime-Line MP14091 Window Screen Frame. There are 20 white pieces constructed from 0.020 inch thick aluminum. The aluminum window screens frames may be used in combination with solar screen fabric (sold separately) to create effective sun screens that mount on the outside of your windows to block most of the sun's hot rays from entering your home. The aluminum screen frame is constructed with a thicker spline channel for added support. Recommended spline size: 0.185 Inch for standard fiberglass cloth, 0.165 Inch for aluminum screen, and 0.155 Inch for solar screen and pet screen. With everything needed in this window screen frame kit to make brand-new window screen frames, you can easily replace one that is missing or damaged. Frame materials are straightforward to work with, easy to cut to size and assemble. Use the window screen frame replacement with Prime-Line square cut 1/4 inch x 3/4 inch plastic corners to create high quality and easy to assemble window screens. Please refer to the line-art for dimensional information and compare with your needs before purchasing.