Andersen&reg; Lower Screen Roller Assembly (1991 to Present) - 1997310 This item replaces screen rollers that have adjustment holes on the edge of the screen frame. Nylon housing with a nylon concave wheel that measures 1-1/4" in diameter and 5/16" thick. Works with these patio door gliding screens manufactured from 1991 to Present. Works with top screen rollers 1997063.