These panels work with existing Eco, Click, and Trax re-tensionable frames. Simply insert into your 23"x31" frame, center the tension rods, then use the stretching tool to tighten the mesh on each side of the frame. That's it! Your screen is re-stretched tighter than any static frame within minutes, without the use of messy glues. Our premium mesh panels are made of industry proven mesh and are marked individually so that you will always know your mesh count and thread diameter. In addition, each panel is permanently woven to four high strength locking strips so that you ll never have to wonder if you ve got them in the right spot. With mesh ranging in size from 83 TPI all the way to 305 TPI you can rest assured that your job will be covered.