If you already have a 7" TFT that is about 165mm x 105mm in size (with a visible area equal to or smaller than ~152mm x 91mm), you can put this glass resistive overlay over it to add a resistive touch screen.Note the 7" is the 'nominal' size - which fits many TFT's called 7" displays. Check the inner/outer dimensions in the technical specs to compare against your display.To use, first remove the protective plastic wrap from both sides. Attach to your touchscreen controller (we suggest our