Andersen&reg; Upper Screen Spring (Before 1991) 1997196 Money Saving Two Pack Available! Search on Amazon for: B01EEI39E2 Genuine Andersen 5/16" wide spring provides tension to screen to keep screen in track. For gliding insect screens manufactured from 1964 to 1991. Each patio door screen takes 2 springs located at the top edge of screen frame. Genuine Andersen Part and Quality, Do Not Be Fooled by Low Priced Knock Offs!